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2023-2024 学年高中语法专项练习单选100 题-将来完成时
1. (2011·天津市·历年真题)On her next birthday，Ann ______ married for twenty years.
A. is B. has been
C. will be D. will have been
【答案】D
【解析】句意：在她下一个生日那一天，安将结婚 20年了。由句子中的on her next birthday可知，本
句的时态应是表示将来的时态，排除A、B两项；由空后的for twenty years可知本句应用将来完成时，
排除C项。故选D。
2. (2023·澳门特别行政区·其他类型)When she graduates from the college this summer, she _______ here
for four years.
A. will study B. will have studied
C. is to study D. has studied
【答案】B
【解析】分析句子结构可知，由when引导的时间状语从句，从句用一般现在时，遵循主将从现的原
则，主句要一般将来时，但句末有一段的时间状语for four years，表示study的动作将在四年里完成，
所以要用将来完成时will have+过去分词。故选B。
3. (2023·澳门特别行政区·其他类型)By this time next year, they _________ married for twenty years.
A. are B. have been
C. will be D. will have been
【答案】D
【解析】考查时态。根据时间状语By this time next year可知，空处谓语动词需用将来的时态，排除选
项A和B，再根据 for twenty years可知，空处谓语动词需用将来完成时态：will have done。故选D。
4. (2022·澳门特别行政区·单元测试)By the end of this year，I________ enough money for a holiday．（
）
A. will save B. will be saving
C. will have saved D. have saved【答案】C
【解析】句意：到今年底为止，我将攒足够的钱去度假。根据句意和时间状语 by the end of this year
是明确表示将来的时间状语，主句表示在这个时间以前完成的动作，故应用将来完成时。故选C。
5. (2022·天津市市辖区·月考试卷)On her next birthday, Ann___________ married for twenty years.（
）
A. will have been B. is
C. has been D. will be
【答案】A
【解析】答案：A．考查时态．句意：在她的下一个生日，安将结婚二十年．根据时间状语，在她的
下一个生日，可以判断本句是将来时态的句子，已经结婚而是年了，应该用将来时完成时，所以A选
项符合．
故选：A．
在她的下一个生日，安将结婚二十年．
时态题的考查关键是抓住句子的上下文含义和句中的时间状语．要根据时间状语来选择合适的时态，
在平时的学习中要注意积累有关时态的用法和各种时态的特殊之处．
6. (2021·澳门特别行政区·其他类型)—I hear that Jason is planning to buy a car.
—I know. By next month, he ________ enough for a used one.
A. will have saved B. will be saving
C. has saved D. saves
【答案】A
【解析】考查将来完成时。句意：——我听说Jason计划要买车了。——我知道。等到下个月，他就
攒够了钱可以买一辆二手车了。本题的关键词为by next month，这里动词save是延续到将来某个时候
的动作，应该用将来完成时。故选A。
7. (2022·天津市·专项测试)It is estimated that hopefully about 0.5 billion families_______5G terminals by
2025， when there is a sharp drop in price.（ ）
A. have used B. will have used
C. will be using D. are using【答案】B
【解析】根据句中的时间状语by 2025可知，by后接将来时间，应该用将来完成时态，即：will have
done形式．
故选：B。
据估计大约有五亿个家庭到2025年将使用5G终端，届时价格将大幅下降．
"by the time "是"到…时间为止"的意思． by+时间，三种用法：
1，by now / up to now / so far,用现在完成时；
2，by+过去某个时间点，用过去完成时；
3，by+将来某个时间点，用将来完成时．
8. (2020·同步练习)—Can we make it to the concert with such heavy traffic?
—Absolutely not. The pianist ______ for about half an hour when we arrive.
A. will be playing B. has played
C. will have played D. has been playing
【答案】C
【解析】句意：——交通这么拥挤，我们能赶上音乐会吗？——绝对不行。当我们到达时，钢琴家将
已经演奏大约半小时。根据Absolutely not可知不可能准时到达，预计将来已经发生的动作，要用将来
完成时will have done，故选C。
9. (2020·陕西省西安市·单元测试)— I didn't expect that the project would be so complex and time-
consuming.
— Nor did I. By this evening, it ______ longer than all the previous ones combined.
A. will last B. has last
C. has been lasting D. will have lasted
【答案】D
【解析】句意：——我本不希望这个项目会变得如此复杂而且耗时。——我也不希望。到今天晚上为
止，项目持续的时间会比之前所有项目耗费的时间还要长。句中 By this evening表示“到今晚为止”，
指到将来某时间为止，所以与将来完成时连用，故选D。
10. (2020·全国·模拟题)Don’t worry. It’s a storm in a teacup—everyone ______ about it by tomorrow.
A. forgets B. has forgottenC. forgot D. will have forgotten
【答案】D
【解析】本题考查时态。句意：别担心，这不过是小题大做，到明天大家就会把这事忘了。根据时间
状语by tomorrow可知，设空处表示将来某一时间之前完成的动作，故选will have forgotten。故选D。
11. (2020·全国·模拟题)As many as ten million children in Africa ________ from the disease by the end of
next decade.
A. recovered B. have recovered
C. are recovering D.
will have recovered
【答案】D
【解析】考查将来完成时。句意：到下一个十年年底，非洲将有多达一千万儿童从这种疾病中康复。
句中by加表示将来的时间短语the end of next decade.表示截止到将来的某个时候，故本句用将来完成
时；A.一般过去时；B.现在完成时；C.现在进行时；D.将来完成时。故选D。
12. (2020·江苏省扬州市·月考试卷)—Can we make it to the concert with such heavy traffic?
—Absolutely not. The pianist _______ for about half an hour when we arrive.
A. will be playing B. has played
C. will have played D. has been playing
【答案】C
【解析】考查将来完成时。句意：—这么拥挤的交通，我们能赶上音乐会吗？—绝对不能。我们到达
时，钢琴师将会已经演奏了大约半个小时了。分析句子，根据问句 Can we make it to the concert with
such heavy traffic?可知，去参加音乐会发生在将来，故排除 B、D；A项表示，我们到达时正在演奏，
不能说正在演奏半小时，故不符合语境，排除；C项for about half an hour常与完成时态连用，提示将
来到达时已经演奏半小时，用将来完成时，符合语境，故选C。
13. (2020·河南省鹤壁市·单元测试)— Can I have a talk with you at about 4 this afternoon, Mr Black?
— All right, I ________ from a conference by then. I will be waiting for you.
A. will have come back B. will come back
C. have come back D. will be coming back【答案】A
【解析】考查时态。句意：——布莱克先生，今天下午4点左右我可以和你谈谈吗？——好吧，那时
我已经开完会回来了。我会等你的。A.will have come back将来完成时；B.will come back一般将来时；
C.have come back现在完成时；D.will be coming back 将来进行时。根据答句中的 by then和I will be
waiting for you可知，此处表示的是将来某个时间之前（今天下午4点之前）已经完成的动作，故用将
来完成时。故选A。
14. (2020·江苏省泰州市·单元测试)—Sorry, sir, but I'm still very concerned about my daughter.
—Relax. You'll be glad to see she ________ to her new life the next time you come.
A. accommodated B. has accommodated
C. will be accommodating D. will have accommodated
【答案】D
【解析】考查时态。句意：——对不起，先生，但我仍然非常担心我的女儿。——放松。你下次来的
时候，你会高兴地看到她已经适应了她的新生活。根据句中the next time you come可知，表示将来的
某个时间会完成的动作，需用将来完成时，构成为主语+shall(第一人称)或will(第二、三人称)+have+过
去分词。A.一般过去时；B.现在完成时；C.将来进行时；D.将来完成时。accommodate to适应，固定短
语。故选D。
15. (2020·宁夏回族自治区石嘴山市·期中考试)—May I speak to your manager at three o'clock tomorrow
afternoon?
—I'm sorry. He ________ to Shanghai by then.
A. will have flown B. had flown
C. can have flown D. has flown
【答案】A
【解析】考查将来完成时。句意：——明天下午三点我可以和您的经理通话吗？——抱歉，到那时他
已经坐飞机去上海了。将来完成时是用在表示在将来某一时间以前已经完成或一直持续的动作，经常
与before+将来时间或by+将来时间连用，也可与before或by the time引导的现在时的从句连用，本题
符合此用法，故应使用将来完成时，由“will+have+动词过去分词”构成。故选A。
16. (2020·江苏省盐城市·单元测试)—Can we make it to the concert with such heavy traffic?—Absolutely not. The pianist _______ for about half an hour when we arrive.
A. has played B. will be playing
C. has been playing D. will have played
【答案】D
【解析】考查时态辨析。句意：——交通这么拥挤，我们能赶到音乐会吗？——当然不能。我们到达
时，钢琴师将已经演奏了大约半个小时了。根据句意以及时间状语 when we arrive.可知，空处要使用
将来完成时。故选D。
17. (2020·江苏省南通市·月考试卷)—Father seems worn out.
—Why not have a family tour? A week's holiday _______ him back to normal.
A. had brought B. is bringing
C. will have brought D. will be bringing
【答案】C
【解析】考查时态。句意：——爸爸似乎精疲力竭了。——为什么不来一次家庭旅游呢？一周的假期
将使他恢复正常。根据语境Why not have a family tour?和back to normal可知，此处表示将来，故排除
选项A、B；此处强调动作在将来带来的结果或影响，要用将来完成时。故选C。
18. (2020·陕西省·单元测试)—May I speak to your manager Mr. Williams at five o'clock this afternoon？
—Sorry. Mr. Williams _______ to a conference long before then.
A. will have gone B. had gone
C. would have gone D. has gone
【答案】A
【解析】考查时态。句意：——今天下午五点我可以和你们的经理 Williams先生通话吗？——很抱歉，
Williams先生在下午五点前就已经去参加会议了。根据at five o'clock this afternoon可知这是将来的事
情，又根据before then可知，这里指在将来某一时间点之前已经发生的事情，应用将来完成时，故选
A。
19. (2020·江苏省南通市·单元测试)When you have finished the report, believe it or not, I ______ for
about 3 hours.
A. will be waiting B. waitedC. will have waited D. have waited
【答案】C
【解析】考查时态。句意：信不信由你，当你写完报告时，我将要等候大约 3个小时。根据前半句
When you have finished the report可知，此处是表示将来的时间，因此主句是表示将来对方完成报告这
一时间之前已完成的等待的动作，故用将来完成时。选项B是过去时；选项D是现在完成时；与将来
的时间不搭配。选项A是将来进行时，和写完以及已经等待的动作不吻合。故选C。
20. —Darling, my routine meeting ends at 8:00 pm. when, I suppose, you ________ dinner.
—But I can wait.
A. will have B. have had C. will have had D. are having
【答案】C
【解析】考查将来完成时态。句意：——亲爱的，我的例会将在晚上 8点结束。我想，那时候，你已
经吃完晚饭了。——但是我可以等你。根据句意可知，在晚上 8点时候，正常情况下，是已经吃完晚
饭，且这是在谈论将来即将发生的事情，用将来完成时。A.will have一般将来时；B.have had现在完成
时；C.will have had将来完成时；D.are having正在进行时。故选C。
21. (2019·江苏省·期中考试)Whenever I think about the day to come when I ________ my goal, I am so
filled with happiness that I start crying.
A. would achieve B. have achieved
C. am achieving D. will have achieved
【答案】D
【解析】考查动词的时态。句意：每当我想到有一天我将实现我的目标，我就会充满幸福，以至于我
开始哭泣。分析句子结构可知when引导定语从句，修饰先行词the day。空格处作定语从句的谓语。
根据the day to come（即将到来的一天）可知，此处指“我将来已经实现我的目标时的一天”，所以
用将来完成时。分析选项A为过去将来时，B为现在完成时，C为现在进行时，D为将来完成时。故选
D。
22. (2019·江苏省连云港市·单元测试)—China will conduct its seventh national population census in
Nov.1, 2020, which will survey both the population and their housing.
—Oh, I ______ admission to my dream university by then.A. will gain B. am gaining
C. have gained D. will have gained
【答案】D
【解析】考查时态。根据后面的by then可知，要用将来完成时，其构成是will have done。故选D。
23. (2019·单元测试)—Jack, my plane arrives at 8:00 pm when, I suppose, you ______ dinner.
—But I can wait.
A. will have B. have had C. will have had D. are having
【答案】C
【解析】考查动词时态。句意：——杰克，我的飞机晚上8点到达，我想那时你可能已经吃完晚饭了。
——但是我可以等。根据“我的飞机晚上8点到达”可知，when指的是将来的时间，再根据下文“但
是我可以等”可知，“你们将吃完晚饭了”用将来完成时，表示将来某个时间已经完成的动作，故选
C。
24. (2019·天津市市辖区·期中考试)By the time I get up in the early morning, my mother ______the
delicious breakfast for me.
A. has made B. made
C. had made D. will have made
【答案】D
【解析】句意：当我一大早上起床的时候，我妈妈将会为我做好了美味的早餐。由by the time可知，
主句应用完成时；“get up in the morning”表示的是将来的动作，主句应用将来的某种时态。结合以
上分析可知，主句用将来完成时。故选D。
25.
Don't worry about the work. By the time you get back from your vacation, we _________ care of everything.
（ ）
A. will have taken B. take
C. have been taking D. are taking
【答案】A
【解析】考查将来完成时。句意：不要忧虑这份工作，到你度假回来时，我们把一切都将弄好了。将来完成时表示：在将来某一时间之前已完成的动作。据本题意可知到你将来度假回来那个时候，我们
的take care of everything的动作已经做完了，因此应用将来完成时。而B表示现在的状况，C表示从过
去到现在还在一直进行的动作，D表示正在进行的动作，均不符合题意。故选A。
26. —Tommy is planning to buy a car.
—I know. By the time he returns from abroad, he ________ enough for a used one.
A. will have saved B. saves
C. had saved D. will save
【答案】A
【解析】考查将来完成时。句意：——Tommy正计划买一辆车。——我知道，到他从国外回来时，他
将会攒够钱买一辆二手车。句中by加 the time he returns from abroad表示截止到将来他回来时候，所
以此处用将来完成时，其谓语构成为：will have done。故选A。
27. — Darling, my routine meeting ends at 8:00 pm when, I suppose, you ______ dinner.
— But I can wait.
A. will have B. will have had C. have had D. are having
【答案】B
【解析】句意：——亲爱的，我的日常会议下午八点结束，我想，到时你应该吃完晚饭了。——但是
我可以等。由回答可知，到八点时，吃饭的动作将会完成，故用将来完成时，结构为 will have done。
故选B。
28. By the summer, Elizabeth ________ here for 10 years.
A. will work B. works
C. will have worked D. has worked
【答案】C
【解析】考查将来完成时的用法。句意：到夏天为止，伊丽莎白就在这里工作了10年了。by是典型
的完成时的介词，by+将来时间，用将来完成时，by+过去时间，用过去完成时。根据句意和by the
summer可知表示动作到将来的某一时间为止，所以用将来完成时。故选C。
29. (2019·天津市市辖区·模拟题)By the time you arrive in London, we _________ in Europe for twoweeks.
A. shall stay B. have stayed
C. will have stayed D. have been staying
【答案】C
【解析】句意：当你到达伦敦时，我们将已经在欧洲逗留两周了。by the time引导的时间状语从句中
使用了一般现在时表示将来，主句应用将来时，因此排除 B 、D。根据句意“我们将已经在欧洲逗留
两周了。”可知应用将来完成时：表示将来某一时间或动作发生之前已经完成的动作。故选C。
30. (2021·天津市市辖区·月考试卷)By the time your habit of managing time is developed ，
you__________better decisions about how to spend your time in your future career．（ ）
A. will have made B. will be made
C. are to make D. have been making
【答案】A
【解析】答案：A 考查动词的时态．By the time 到……时候为止，从句用一般现在时来表示将来的动
作，表示"到将来的某个时候为止"，主句通常用将来完成时．A项符合题意．
故选：A．
当你管理时间的习惯养成后，你会对如何在未来的职业生涯中度过时间做出更好的决定．
本题考查动词的时态．在理解语境的基础上，熟知不同时态所对应的标志词及题干中暗含的时态信息，
注意前后时态呼应，从而作出正确选择．
31. By the end of next July,this building_________ .（ ）
A. will be finished B. will have finished
C. will have been finished D. will finish
【答案】C
【解析】介词短语by the end of..意为"到...末为止"，通常和完成时连用，如果后面接将来时间，要和
将来完成时连用，如果接过去时间，要和过去完成时连用。本句next July表示将来时，所以要与将来
完成时连用。而且主语this building与动词finish构成被动关系，所以使用将来完成时的被动语态。
故选：C。
到今年7月为止，这个建筑将已经被完成。
将来完成时用来表示在将来某一时间以前已经完成或一直持续的动作．经常与before+将来时间或by+将来时间连用，也可与before或by the time引导的现在时的从句连用。
32. (2021·天津市·模拟题)I promise I ______ all the money I owe you by the end of next month.（ ）
A. pay back B. will have paid back
C. have paid back D. had paid back
【答案】B
【解析】根据句意理解及句中的by the end of next month（到下个月底），可知事情发生在过去，到
现在，并要持续到将来，所以要使用一般将来时的完成时。
故选：B。
我保证到下个月底把我欠你的钱都还了。
要注意理解句意，把握时间点及时间段，才能准确运用时态。
33. (2021·天津市县·模拟题)Hopefully in 2025 we will no longer be e-mailing each other, for we _______
more convenient electronic communication tools by then.
A. have developed B. had developed
C. will have developed D. developed
【答案】C
【解析】句意：希望到2025年我们不再互相发电子邮件了，因为那时我们将会有更便利的电子交流工
具。根据句末的时间状语by then可知，这里指的是到2025年。截止到将来的某个时间为止，所以用
将来完成时态。故选C。
34. Hopefully in 2025 we will no longer be e-mailing each other, for we _______ more convenient
electronic
communication tools by then. （ ）
A. have developed B. had developed
C. will have developed D. developed
【答案】C
【解析】根据句末的时间状语by then 可知，这里指的是by 2025，截止到将来的某个时间为止，所以
用将来完成时态．
故选：C．到2025年，我们很有希望不再相互发送电子邮件，因为那时我们将会有更便利的电子交流工具．
对时态的选择，要在把握时态的基本用法的基础上，根据具体语境和题干中的时间推断时态；同时关
注动词的语态，理清不同时态的被动语态的形式以及主语和谓语动词之间的关系，做出合理的判断．
35. (2020·黑龙江省哈尔滨市·期中考试)Tom says he successfully in three
marathons by the time he finishes this one. （ ）
A. will run B. will have run C. has run D. runs
【答案】B
【解析】考查将来完成时．根据by the time he finishes this one 可知是将来完成时．
故选：B．
汤姆说，等他跑完这场马拉松时，他已经跑了三场了．
将来完成时用来表示在将来某一时间以前已经完成或一直持续的动作．经常与before+将来时间或
by+将来时间连用，也可与before或by the time引导的现在时的从句连用．
36. (2020·宁夏回族自治区石嘴山市·期中考试)-May I speak to your manager at three o'clock tomorrow
afternoon ？
-I'm sorry. He ________ to Shanghai by then. （ ）
A. will have flown B. had flown
C. can have flown D. has flown
【答案】A
【解析】由时间状语by then" 到那时"，then指的是tomorrow afternoon,可知表示的是将来某一时间
将会完成的动作，因此使用将来完成时will have done的形式．
故选：A．
--我可以在明天下午三点和你的经理打电话吗？
--不好意思．到那时他将已经飞去上海了．
考查句子时态，要分析句子结构，根据语境对答案进行确定．
37. (2020·全国·同步练习)By the time tomorrow, you __________your homework. （ ）
A. would finish B. finish
C. will have finished D. will finish
【答案】C【解析】由时间状语By the time tomorrow 可知，表示到未来某一时间将完成的动作，因此使用将
来完成时will have done的形式。
故选：C。
到明天这个时候，你将完成了你的作业。
考查句子时态，要分析句子结构，根据语境对答案进行确定。
38. I suppose by the time I come back in ten years'time all these old houses ______ down．（ ）
A. will have been pulled B. will be pulling
C. will have pulled D. will be pulled
【答案】A
【解析】答案：A．动词词组pull down意为"摧毁，拆掉"，旧房子应该是"被拆掉"，要用被动语态，
故排除BC，时间状语by the time I come back 意为"到我回来为止"，根据句意在这里应该用于完成时
态，又由in ten years'time 可知用将来时态，综合以上分析，答案应为A，用将来完成时的被动语态．
故选：A．
我想再过十年等我回来的时候，所有的旧房子都将被拆掉了．
本题要结合时间状语等关键词确定句子的时态和语态，选出正确答案．
39. (2020·江苏省南京市·模拟题)—Tommy is planning to buy a car.
—I know.By next month，he ______ enough for a used one.
A. saves B. saved
C. will save D. will have saved
【答案】D
【解析】考查动词时态。根据时间状语by next month可确定，此处应用将来完成时，表示“到下个月
为止，他将攒够买一辆二手车的钱。”
40. (2019·江苏省南京市·单元测试)— Jack, my plane arrives at 8:00 pm when, I suppose, you ______
dinner.
— But I can wait.
A. will have B. have had C. will have had D. are having
【答案】C
【解析】考查时态。句意：——杰克，我的飞机晚上8点到达，我想你当时已经吃完晚饭了。——但我可以等。将来完成时的构成为: will + have + done，它表示将来某一时间之前预计要完成的动作。根
据语境，第一个人正是预计在飞机到达时对方已经会吃完晚饭，故选C。
41. (2020· 河 南 省 鹤 壁 市 · 单 元 测 试 )By the time he leaves university ，
he ___ much work experience so long as he takes a part-time job．（ ）
A. will have gained B. has gained
C. may have gained D. will gain
【答案】A
【解析】答案：A。
根据句中的时间状语By the time he leaves university可知，这是截止到将来的某个时刻已经发生的动作，
所以用现在完成时；故选A。
到他大学毕业时，只要他从事一份兼职工作，他将会获得大量的工作机会。
本题考查将来完成时，表示截止到将来的某个时间点已经完成的动作，做题时，要把握句中时间状语
by the time he leaves university这一特点，结合句意，选择正确的时态。
42. (2020·陕西省西安市·月考试卷)---I didn’t expect that the project would be so complex and time-
consuming.
---Nor did I. By this evening, it _____ longer than all the previous ones combined.
A. will last B. has last
C. has been lasting D. will have lasted
【答案】D
【解析】句意：到今天晚上之前，它持续的时间将会比之前的都长。根据句意可知用将来完成时。故
选D。
43. (2019·天津市市辖区·期末考试)By the end of this term, we ________ 6,000 English words in all.
A. will learn B. will have learned
C. learned D. had learned
【答案】B
【解析】句意：到这个学期结束时，我们将已经总共学习了6000个英语单词。A.will learn一般将来时；
B.will have learned将来完成时；C.learned一般过去时；D.had learned过去完成时。“by+时间”意为“不迟于，到……时为止”，与动作性强的动词连用时，主句一般用完成时；根据 the end of this term
可知说明将来的情况。综上所述，时态应为将来完成时。故选B。
44. (2019·上海市市辖区·月考试卷)By the time when the course comes to an end， _____ a lot about
computer．（ ）
A. we'll have learned B. we'll learn
C. we're leaning D. we have learned
【答案】A
【解析】本题考查将来完成时态．"by the time "是"到…时间为止"的意思，句子一般用相关的完成时
态．By the time the course comes to an end 是"到这个课程结束为止（但现在还没有结束）"，从句用
一般现在时表示将来时间．所以本题应该用将来完成时态． 故选：A．
到课程结束为止，我们将已经学到很多关于电脑的知识．
"by the time "是"到…时间为止"的意思． by+时间，三种用法：1，by now / up to now / so far，用现在
完成时；2，by+过去某个时间点，用过去完成时；3，by+将来某个时间点，用将来完成时．
45. (2019·北京市市辖区·其他类型)They are trying to make sure that 5G terminals _________ by 2022 for
the Beijing Winter Olympics.
A. will install B. will have been installed
C. are installed D. have been installed
【答案】B
【解析】考查时态和语态。句意：他们正努力确保在2022年北京冬奥会之前安装5G终端。表示在将
来某一时间以前已经完成或一直持续的动作，用将来完成时。“5G终端”和“安装”之间是被动关系，
用被动语态，故选B。
46. - He speaks Chinese very well．
- It's not surprising． He ___ in Beijing for nine years next week．（ ）
A. has been living B. has lived
C. will have been lived D. will have been living
【答案】D
【解析】考查将来完成进行时．根据时间状语next week要用一般将来时，且live表示从过去持续到现在一直是在进行的动作，还将进行下去，用将来完成进行时．故D项正确．
故选：D．
--他汉语说得很好．
--这不吃惊．下周他将已经在北京住了九年了．
解答此类问题要了解各种时态的基本含义，并区别各种时态之间的差异，了解某些时态的特殊用法，
然后结合语境选择正确答案．
47. The US troops_______ out of Iraq by the end of next month and they were sent there 9years ago．（
）
A. have withdrawn B. will withdraw
C. had withdrawn D. will have withdrawn
【答案】D
【解析】答案：D 考查时态辨析．by+现在时间，主句用现在完成时；by+将来时间，主句用将来完成
时；by+过去时间，主句用过去完成时． by the end of next month "到下个月月末"为表示将来时间的短
语，所以主句要用将来完成词．
故选：D．
美军在下个月末将会已经撤离伊拉克，从开始驻军到撤离有9年了．
单项选择题考查内容广泛，涉及词汇、语法、习语、日常用语等．在有限的题量中注意知识的覆盖面，
设计特定的语境综合考查学生在一定的语境中运用语言知识的能力
48. (2019·江苏省镇江市·期末考试)— Have you heard of the new public transportation system in
Suqian?
— Yes. It is reported that the system _________ by the end of 2020.
A. will set up B. is set up
C. will have been set up D. has been set up
【答案】C
【解析】句意：——你听说过宿迁市的新公共交通系统吗？——是的，据报道这个系统将在2020年底
建立。根据by the end of 2020可知，用将来完成时。the system与set up是被动关系，用被动语态。
故选C。49. By the end of this year the production of this factory _____ by more than 35%， _____ with that of
last year．（ ）
A. will have risen； compared B. had risen； compared
C. will be rising； comparing D. had risen； comparing
【答案】A
【解析】答案：A 考查将来完成时． by+现在时间，主句用现在完成时；by+将来时间，主句用将来
完成时；by+过去时间，主句用过去完成时．By the end of this year "到今年年末"为表示将来时间的短
语，所以主句要用将来完成词．排除A．B．C；且the production和compare之间是被动关系．
故选：A．
到今年年末这个工厂今年的产量和去年相比增长了超过百分之三十五．
单项选择题考查内容广泛，涉及词汇、语法、习语、日常用语等．在有限的题量中注意知识的覆盖面，
设计特定的语境综合考查学生在一定的语境中运用语言知识的能力．
50. Tom says he successfully in three marathons by the time he finishes this one．（ ）
A. will run B. will have run C. has run D. runs
【答案】B
【解析】考查将来完成时．根据by the time he finishes this one可知是将来完成时．
故选：B．
汤姆说，等他跑完这场马拉松时，他已经跑了三场了．
将来完成时用来表示在将来某一时间以前已经完成或一直持续的动作．经常与before+将来时间或
by+将来时间连用，也可与before或by the time引导的现在时的从句连用．
51. (2019·江苏省无锡市·单元测试)—How are you getting along with your presentation?
—Almost ready, and I __________ all I am supposed to.
A. did B. had done
C. have done D. shall have done
【答案】D
【解析】句意 :——你的报告做得怎么样了?——差不多了。我将会完成我该做的全部。表示在将来某
个时间之前已经完成的动作，应使用将来完成时。故选D。52. (2019·安徽省·单元测试)My mother is working on a novel. Hopefully it _________ by the end of this
year.
A. has been published B. will have been published
C. is being published D. will have published
【答案】B
【解析】句意：我妈妈正在写一本小说。希望今年年底这部小说能够出版。由题干中的by the end of
this year可知，句子的时态是将来完成时，因此排除A和C；句子的主语是it，和谓语动词publish是
被动关系，因此排除D。故选B。
53. (2019·天津市市辖区·月考试卷)---Will Jim come to play basketball?
---Not until he ____ his homework..
A. will have finished B. is finishing
C. is to finish D. has finished
【答案】D
【解析】考查动词的时态。根据问句吉姆来打篮球吗？可知，表示将来要发生的事情，用将来时，由
答语：他完成家庭作业才能来，可知表示将来要完成的动作，用将来完成时，until引导时间状语从句
用现在完成时代替将来完成时，故选D。
54. (2019·黑龙江省鹤岗市·月考试卷)
This January will be very precious for us by which time we________ reviewing Senior Book I．（ ）
A. will finish B. will have finished
C. have finished D. will be finished
【答案】B
【解析】B，考查将来完成时，根据by which time可知指的是到将来某个时间将完成的动词，使用将
来完成时will have done的形式．
故选：B．
这个一月将对我们来说是非常珍贵的，到那个时候我们将复习完高中第一本书．
考查时态的运用，句中有明显的时间状语时，要通过其来判断使用的时态．
55. (2019·江苏省南通市·月考试卷)Recently, a group of scientists worked together to successfully“edit” a human embryo and remove a genetic mutation (变异) that _______ heart disease otherwise.
A. had led to B. would lead to
C. would have led to D. led to
【答案】C
【解析】考查将来完成时。句意：不久前，一群科学家共同努力，成功地“编辑”了一个人类胚胎，
并移除了一个会将导致心脏病的基因突变。定语从句，从句需要补充谓语，根据句意可知，表示将来
会发生的事，根据主句谓语worked可知，站在过去说将来用would have done。故选C。
56. (2019·江苏省南京市·单元测试)
By the end of this month， we surely _______________a satisfactory solution to the problem．（ ）
A. have found B. will be finding
C. will have found D. are finding
【答案】C
【解析】本题考查时态．根据句意和结构可知by the end of this month可知用将来完成时．
故选：C．
到本月底，我们一定能找到令人满意的解决办法．
本题考查动词时态．根据句意和句中所给的时间状语判断应该使用什么时态．
57. (2019·江苏省南京市·单元测试)The conference________ a full week by the time it ends．（ ）
A. must have lasted B. will have lasted
C. would last D. has lasted
【答案】B
【解析】答案：B。考查将来完成时的用法。根据句意可知，到将来某时（会议结束）之前已完成的
动作，使用主将从现，所以用将来完成时。故选B。
会议从开始到结束，将持续整整一个星期。
本题考查动词时态，如果是主句+状语从句，需要注意是否使用主将从现，还有介词by和完成时搭配。
58. (2019·江苏省南京市·单元测试)By the end of the year all but two people _______________．
（ ）
A. have left B. will leave
C. will be leaving D. will have left【答案】D
【解析】本题考查动词时态．根据句意和时间状语by the end of the year"到年底为止"用将来完成时．
故选：D．
到年底，除了两个人以外，所有人都将离开．
本题考查动词时态．根据句意和句中所给的时间状语判断应该使用什么时态．
59. (2019·江苏省南通市·月考试卷)The children must have got lost in the woods; otherwise, they______
at the lakeside camp as scheduled.
A. were B. will be
C. would have been D. had been
【答案】C
【解析】本题句意：孩子们肯定在树林里迷路了，否则他们会按照计划到湖边的营地。此处考查将来
完成时，指的是站在过去的角度看将来即将发生某事。此处使用 must have done表示对过去的推测。
故选C。
60. (2019·江苏省苏州市·月考试卷)—Tony, it seems that you have been very busy all the time. What do
you think of your occupation now?
—Just so-so. I've decided to quit my job in the company next month, where I ______ for five years.
A. work B. is working
C. will be working D. will have worked
【答案】D
【解析】句意：——托尼，你好像一直很忙。你现在对你的职业有什么看法？——一般般，我决定下
个月辞去公司的工作，到下个月为止我将在公司已经工作了五年。从第二句可以看出：我决定下个月
辞去公司的工作，说明还没有辞职，结合for five years，表将来到辞职时，在这工作了五年，故选D。
61. (2019·江苏省南通市·单元测试) By the time you get to the airport, she______ for New Zealand.
A. would be leaving B. had already left
C. was leaving D. will have left
【答案】D
【解析】考查将来完成时。由时间状语从句By the time you get to the airport可知，此处表示将来某个时间已经完成的动作，用将来完成时。A项过去将来进行时；B项过去完成时；C项过去进行时；D项
将来完成时，故选D。
62. (2019·江苏省无锡市·单元测试)It is reported that the output of the factory ______ by about 20% by
the end of this year.
A. will have risen B. will be raised
C. will rise D. will have raised
【答案】A
【解析】句意：据报道，到今年年底，该厂的产量将增长 20%左右。rise增长，不及物动词；raise提
高、提升，及物动词。根据后面的时间状语by the end of this year可知，此处应用将来完成时，故选
A。
63. (2019·江苏省泰州市·单元测试)—I hear John is planning to buy a new car.
—Yes. By next month, he ______ enough money for a new car.
A. will save up B. saved up
C. has saved up D. will have saved up
【答案】D
【解析】句意：——我听说约翰打算买一辆新车。——是的。到下个月，他就可以攒够钱买一辆新车
了。根据时间状语By next month可知需要使用将来时态，排除选项B和C，同时强调动作产生的结果
影响，应使用完成时，结合题意要用将来完成时，故选D。
64. (2019·江苏省镇江市·水平会考)The students have decided on a final date by which everyone _______
reading the books assigned by their professor.
A. finishes B. will have finished
C. have finished D. finished
【答案】B
【解析】句意：学生们决定了最后一个日期，在这个日期之前，每个人都将读完他们教授分配的书。
由时间状语a final date by which可知，设空处谓语动词表示在将来某个时间之前完成的动作，需用将
来完成时态：will have done。故选B。65. (2019·江苏省无锡市·单元测试)The committee is discussing the problem right now. Hopefully it
_______ by the end of next week.
A. will have been solved B. will have solved
C. will be solved D. is solved
【答案】A
【解析】句意：委员会正在讨论这个问题。希望到下周末将得到解决。根据句中时间状语 by the end
of next week，可知应使用将来完成时，it与“solve”解决之间是被动关系，因此需要使用将来完成时
态的被动语态。通过分析，故选A。
66. (2019·江苏省无锡市·期中考试)By the time scientists the fundamental structure of dark matter,
I'm sure that man amazing advances in science.
A. figure out; has made
B. will figure out; will make
C. figure out; will have made
D. will figure out; will be making
【答案】C
【解析】句意：当科学家们弄清楚暗物质的基本结构时，我相信人类将在科学上就已经取得惊人了的
进步。by the time到了……的时候，引导时间状语从句，从句中应用一般现在时代替一般将来时；
“by the time…”这样的时间状语与完成时连用，由语境可知，主句中应用将来完成时。根据句意，
故选C。
67. (2019·安徽省合肥市·单元测试)—It's a complete mess. Where are the kitchen table tops？
—At the back. We _____ them by 7 pm this evening．
A. are placing B. have placed
C. will be placing D. will have placed
【答案】D
【解析】句意：——真是一片混乱，餐桌的桌面在哪儿？——在后面，到今天晚上 7点钟的时候我们
就会放置好餐桌面。此题考查将来完成时，表示在将来某一时间以前已经完成的动作或处于的状态；
本题的题意为到今天晚上7点钟的那个时候我们已经放好了桌子，表示的是将来的某时（7点钟之
前）已经做好了某事，故用将来完成时。根据分析，故选D。68. (2019·江苏省·单元测试)—Have you finished your report yet?
—No, but I_______it by Friday.
A. am finishing B. would have finished
C. will have finished D. was finishing
【答案】C
【解析】句意：——你已经完成你的报告了吗？——没有，但是我到星期五之前将会完成。根据句意
和时间状语by Friday可知，星期五是将来的时间，现在在做，将来某个时间之前将完成的动作，用将
来完成时。故选C。
69. (2019·江苏省泰州市·单元测试)By the time Jane gets home, her aunt ________ for London to attend a
meeting.
A. will leave B. leaves
C. will have left D. had left
【答案】C
【解析】略
70. By the time you get back, great changes ______ in this area.
A. will take place B. will have taken place
C. are going to take place D. will be taken place
【答案】B
【解析】句意：到你回来的时候为止，这里将会发生巨大的变化。根据本题中by the time you get back
（到你回来的时候为止）判断，句中需要将来完成时。将来完成时表示在将来某一时间之前已完成的
动作，构成是will have done。take place发生，不能用于被动语态。根据句意及用法，故选B。
71. (2019·江苏省·期末考试)--- I didn't expect that the project would be so complex and time-consuming.
--- ___________. By this evening, it ___________ longer than all the previous ones combined.
A. Neither did I; will last B. Neither I did; has last
C. Nor did I; will have last D. Nor I did; has been lasting
【答案】C【解析】句意：——我没想到这个项目会如此复杂和耗时。——我也没料到。到今天晚上，它比以往
所有项目所需时间总和都长。第一空下文说“到今天晚上，它比以往所有项目所需时间总和都长”可
推断，“我也没料到”，neither，nor位于分句或句子的开头，用部分倒装，表示前面所说的情况也
不适合于另一个人（或事物），表示“我也不这样”之类的概念，故BD项错误；第二空考查动词时
态，结合句意并根据语境可知，这里使用将来完成时，表示在将来某个时间之前完成的动作或存在的
状态，用将来完成时，故选C。
72. (2019·江苏省宿迁市·期末考试)--- When will the bike-sharing schemes be introduced to the public?
--- Not until ______ a better understanding of them.
A. will we have had B. have we had
C. we will have had D. we have had
【答案】A
【解析】本题考查了not until 位于句首时，句子使用部分倒装句的用法。部分倒装句的使用是：助动
词\系动词|情态动词+主语+谓语，结合选项，故先排除C，D。再联系本句时态，说的是以后的事，故
用将来时，故选A。
73. (2019·黑龙江省大庆市·期末考试)--- Is Tom still smoking?
--- No. By next Saturday he _____ for a whole month without smoking.
A. will have gone B. will have been
C. will go D. has been going
【答案】B
【解析】句意：--- 汤姆还在抽烟吗？---不了。截止到下周六，他就整整一个月一根烟没抽了。根据
By next Saturday（截止到下周六）所以用将来完成时，排除 AD项；根据go without sth．是固定搭配，
译为：在没有…的情况下进行下去，故选B。
74. The meeting a full week by the time it ends．（ ）
A. had lasted B. will have lasted
C. would last D. has lasted
【答案】B
【解析】本题考查时态．根据句意和结构可知这里使用主将从现，而且和by the time搭配的主句用完成时态．
故选：B．
到它结束的时候，会议将持续一整星期．
本题考查时态．根据句子的时间状语判断还有要结合句意理解，判断是否使用被动语态．
75. (2019·江苏省泰州市·单元测试)When you visit our town next August, a modern sports center
_______, for the National Games are to be held then.
A. will be constructing B. has been constructing
C. will have been constructed D. is being constructed
【答案】C
【解析】略
76. (2019·江苏省无锡市·单元测试)I hope Jack's health _______ greatly by the time we go back to school
this September.
A. improves B. improved
C. will be improving D. will have improved
【答案】D
【解析】句意：我希望杰克的健康到我们九月回到校园的时候已经改善了很多。by the time到……为
止，主句用完成时，通过语境可知this September在这里表将来，故这里用将来完成时，故选D。
77. By the time Jane ______home, her aunt ________ for London to attend a meeting.
A. got; would have left B. will get; will have left
C. gets; will have left D. gets; will leave
【答案】C
【解析】略
78. They ________ from the university before he returns from abroad.
A. will have been graduated B. will be graduated
C. will graduate D. will have graduated
【答案】D
【解析】句意：在他从国外回来之前他们将已经大学毕业了。根据语境本句要用将来完成时，表示在将来某一时间前某事已经发生，将来完成时的谓语动词要用 will have+动词过去分词，同时根据句意可
知主语与动词毕业是主动关系，故选D。
79. —I'll come to see your performance at 9:00 tomorrow evening.
— I'm sorry, by then my performance _______ and I ______ reporters in the meeting room.
A. will end, will meet
B. will have ended, will be meeting
C. will be ended, am going to meet
D. is to end, will meet
【答案】B
【解析】句意：——我明晚9点来看你的演出。——对不起，那时我的表演已经结束了，我将在会议
室会见记者。时间状语by then意为“到那时”，常与完成时连用，故第一空谓语动词应用将来完成
时态；根据语境可知：到那时我在会议室正在会见记者，那时是指在九点钟，在具体的点时间进行的
动作要用现在进行时；又因整个动作是在将来发生的，故第二空谓语动词要用将来进行时。故选B。
80. The deep racial divide in the US makes the death of the black man more than a crime story. People are
wondering if the same thing ______ had Brown been a white man.
A. would happen B. will be happening
C. would have happened D. must have happened
【答案】C
【解析】句意：美国种族的深层分歧使黑人的死亡不仅仅是一个犯罪故事。很多人却提出质疑：如果
布朗是一名白人，惨剧是否还会重演？本句是if引导的虚拟语气，对过去的虚拟，主句用would have
done形式。故选C。
81. -Is Tom still smoking？
-No． By next Saturday， he ______ for a whole month without smoking a single cigarette．（ ）
A. will be B. will have gone
C. will have been D. has been going
【答案】B
【解析】根据"By next Saturday"（截止到下周六）所以用将来完成时．排除AD项；根据 go without sth．是固定搭配，译为：在没有…的情况下进行下去，
故选：B．
--- 汤姆还在抽烟吗？
--- 不了．截止到下周六，他就整整一个月一根烟没抽了．
大量积累各种时态的用法，仔细分析语境，逐项排除得出最佳选项．
82. It is reported that China ______ its first orbiting space station by around 2022．（ ）
A. is to complete B. is going to complete
C. will complete D. will have completed
【答案】D
【解析】答案：D。
by+时间作状语时，主句通常用完成时态。根据时间状语by around 2022可知，时间是截止到一个将来
的时间，所以设空处应该用将来完成时（will have completed），故选D。
据报道，到2022年左右中国将建成第一个轨道太空站。
本题考查时态。时态题关键在于对句意的理解，要根据上下文以及时间状语，找到符合语境的答案。
83. - Are you going to the cinema tonight？
- Yes， I think I _______ my work by then．（ ）
A. will finish B. finish
C. am going to finish D. will have finished
【答案】D
【解析】答案：D考查将来完成时．根据Are you going to the cinema tonight？可知此处用将来时；由
by then可知用完成时，综合以上分析，will have finished符合题意，
故选：D．
-你今晚去看电影吗？-会的，我认为到那时我将会完成我的工作．
根据句子大意，分析句子结构，特别找出时间状语，确定动词时态，最终得出最佳答案．
84. Marie’s husband has to stay up for extra work, and she estimates when he gets home from work, the
clock _______ twelve at midnight.
A. had struck B. is striking
C. has struck D. will have struck【答案】D
【解析】句意：玛丽的丈夫必须熬夜加班，她估计他下班回家时，钟会在午夜敲十二下。根据句意，
结合句子时态为将来完成时，故选D。
85. —Will you take over at the next service area? I want a short break.
—By all means. You _____ for more than three hours by that time.
A. will be driving B. have driven
C. will have been driving D. have been driving
【答案】C
【解析】句意：——在下一个服务区你可以接手吗？我想短暂休息一下。——当然可以。到那时你已
经开车三个多小时了。根据第一句的谓语动词中的will可知，此处表示的是在将来的时间到下一个服
务区；结合第二句的时间状语by that time和句意可知，本句用将来完成进行时。故选C。
86. Jim received a letter from his friend, reading, “ Dear Jim, by the time the letter reaches you, I ______
your city.”
A. had left B. have left
C. left D. will have left
【答案】D
【解析】句意：Jim收到朋友的来信，信上写到“亲爱的Jim，当你收到这封信时，我已经离开你的城
市了”。by the time用来引导时间状语从句时，从句用一般现在时，主句用将来完成时态。结合选项
和句意，故选D。
87. —What do you think of the film I want to see this weekend?
—As you _______, it is a wonderful love story with a surprising ending.
A. can have noticed B. could have noticed
C. will have noticed D. would have noticed
【答案】C
【解析】句意：——你觉得这个周末我想看的电影怎么样？——正如你会注意到的一样，这是一个美
妙的爱情故事，结局令人惊讶。根据this weekend可知，此处用将来时；由with a surprising ending说明是将要完成，所以用将来完成时。故选C。
88. He has been here for a month and it is likely that he ________ the different style of football by the
time the new season starts.
A. has adapted to B. is adapting to
C. will have adapted to D. adapts to
【答案】C
【解析】句意：他在这里已经一个月了，在新赛季开始之前，他很可能已经适应了不同的足球风格。
by the time the new season starts.“在新赛季开始之前”，是将来时间，故此处用将来时。will have
adapted to是将来时态，其它几个选项都不符合时态，故选C。
89. It ___ the first time that my friend Anne _____ to Guangzhou last year, so I went to the station to pick
her up.
A. is; has been B. has been; went
C. has been; had gone D. was; had been
【答案】D
【解析】句意：这是我朋友安去年第一次来广州。所以我去车站接她。It is（was）the first time that
…引出的 that从句必须用现在（过去）完成时，固定句型。根据过去的时间状语last year可知，主句
用一般过去时，that从句用过去完成时。故选D。
90. It is reported that by the end of the this year, the production in the factory ____ by about 20%.
A. will have risen B. has risen
C. will be risen D. has been rising
【答案】A
【解析】句意：据报道，到今年年底，工厂的产量将增加约20%。根据句意此处应用将来完成时，故
选A。
91. — I will come to your lecture at 10:00 am tomorrow.
— I’ m sorry. By then my lecture _______ and I ______ my guests in my office.
A. will end; am being metB. have ended; will meet
C. will have ended; will be meeting
D. will have ended; will have met
【答案】C
【解析】句意：---明天早晨十点钟时我会来听你的讲演。
---很抱歉。到那时我的讲演已经结束。那时我应正在办公室接待我的来客。
考查动词时态，将来进行时与将来完成时。明天十点之前已做完某事，用将来完成时；十点正在接待
客人用将来进行时。故选C。
92. By the time we _______ to the cinema, the film __________.
A. get; will start B. get; will have started
C. will get; will start D. will get; will have started
【答案】B
【解析】句意：我们到电影院的时候，电影将已经开始了。by the time意为“到……时”，后跟过去
的时间或从句谓语是一般过去时态，主句要用过去完成时态；后跟将来时间状语或从句谓语是现在时
态，主句要用将来完成时态。由于by the time引导的是从句，所以用现在时态代替将来时态，选项D
错误。故选B。
93. -Daniel， you have a well-paid job!
-Eh， not had． I have to quit my job this September because of my further study， by when I for more
than 2 years．（ ）
A. have worked B. worked
C. will be working D. will have worked
【答案】D
【解析】考查时态．根据句意可知by then指的是by this September，表示到将来某个时间为止的时间
和将来完成时搭配．
故选：D．
-丹尼尔，你有一份待遇优厚的工作！
-嗯，没有．我必须在今年九月辞去我的工作，因为我会继续学习，届时我将已经工作了2年．
本题考查动词时态，有时间条件状语从句的时候，注意使用主将从现，用一般现在时代替一般将来时，现在完成时代替将来完成时．
94. — How are you getting along with your speech?
— Almost ready, and I___________all I am supposed to.
A. did B. had done
C. have done D. shall have done
【答案】D
【解析】句意：快要完成了，我会做到我应该做的。根据句意可知用将来完成时。故选D。
95. When Sarah graduates from university next year, she ________ German for nearly four years.
A. has studied B. has been studying
C. will study D. will have been studying
【答案】D
【解析】句意：当Sarah从大学毕业的时候，她将已经学习德语将近四年了。由句意可看出，Sarah大
学毕业的时间在将来，动作会一直持续到将来的时间点并且可能继续持续下去，要使用将来完成进行
时。故选D。
96. She has been studying here for five years and by the end of next summer she ________.
A. will graduate B. will be graduating
C. will be graduated D. will have graduated
【答案】D
【解析】句意：她已经在这里学习五年了，到明年夏末她将毕业了。根据时间状语by the end of next s
ummer表明将来某个时间已经做过某事，应该用将来完成时，故选D。
97. I hope you________ the instructions ready before I come tomorrow．（ ）
A. to get B. shall get
C. will get D. will have gotten
【答案】D
【解析】答案：D。考查将来完成时的用法。根据句意可知，把说明书准备好发生在明天我回来之前，
所以用将来完成时。故选D。我希望你在我明天来之前，你已经把说明书准备好了。
本题考查动词时态。首先要弄清时态的基本用法，这题是将来完成时，表示将来某个时间之前已经发
生的事情。
98. By the end of next year, the government _______ work on the new stadium, which has been designed
by Kurt Gunter.
A. has been finished B. has finished
C. will have been finished D. will have finished
【答案】D
【解析】句意：到明年年底，政府将完成由Kurt Gunter设计的新体育场的建设工作。根据By the end
of next year可知，这里表示到将来某一时间为止已经完成的动作，所以要用将来完成时，而且是主动
语态。故选D。
99. If you go on spending money like that ， you ____ every cent of yours by the end of the month ． （
）
A. are using up B. are to use up
C. will have used up D. shall use up
【答案】C
【解析】答案：C 根据句意可知这句话使用if条件句的一般现在时，使用主将从现的规则，主句用将
来时，by the end of和完成时搭配，用将来完成时。故选C。
如果你继续向这样花钱，你到月底将花去每分钱。
本题考查时态，适当运用语法规则和固定搭配。
100. By the time you come back，I _____________，so please make no noise when you come in．（
）
A. have been sleeping B. shall have slept
C. shall sleep D. shall be sleeping
【答案】B
【解析】答案：B
根据句子里时间状语"By the time you come back"意为"到你回来时"，表示一个到将来某时刻为止的动作，句子时态需用将来完成时，即will+have done。
到你回来时，我都已经睡了。所以请别发出噪音。
考查时态。考生需掌握by+时间状语的不同时态选用。如：by+过去时，时态用had done；by+现在时，时
态用have done；by+将来时，时态用will+have done。
