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Unit 8 It must belong to Carla.
第三课时（分层作业）
基础达标
一、单项选择
1．—Have you seen my school ID card, mum? I can’t find it.
—Oh, it ________ be in your pencil case. I saw you put it there this morning.
A．can B．must C．need D．will
【答案】B
【详解】句意：——妈妈，你看到我的学生证了吗？我找不到它了。——哦，它一定
在你的铅笔盒里。我今天早上看到你放那了。
考查情态动词辨析。can能够；must必须；need需要；will将会。根据后句“I saw you
put it there this morning.”可知，应是它一定在你的铅笔盒里，表示肯定的推测，应用
must。故选B。
2．—Chang’e II landed on the surface of the moon successfully.
—Wonderful. All Chinese ________ be very proud.
A．may B．might C．must D．can
【答案】C
【详解】句意：——嫦娥二号成功登陆月球表面。——太棒了。所有的中国人一定都
很自豪。
考查情态动词辨析。may可能；might可能，may的过去式；must必须；一定；can可
以。根据“Wonderful.” 可知此处表示非常肯定的猜测，C项符合语境，故选C。
3．You ________ be tired after the whole day’s work.
A．must B．should C．can D．would
【答案】A
【详解】句意：干了一整天的活，你一定很累了。
考查情态动词辨析。must一定；should应该；can可以；would将会。根据“You...be
tired after the whole day’s work.”可知，此处表示非常肯定的推测，用must。故选A。
4．—The clothes on your bed ________ be very dirty, Jim. They are smelly.
—Oh. I forgot to put them into the washing machine.
A．need B．might C．must D．can
【答案】C
【详解】句意：——吉姆，你床上的衣服一定很脏。它们很臭。——哦。我忘记把它们放进洗衣机了。
考查情态动词。need需要；might可能；must一定；can能，会。根据“They are
smelly.”可知，衣服一定很脏，此处是肯定的推测，应用must，故选C。
5．—I’m looking for our English teacher. Where is she?
—She __________ be in Class One. It’s their English class now.
A．must B．can C．may D．need
【答案】A
【详解】句意：——我正在找我们的英语老师。她在哪里？——她一定在一班。现在
是他们的英语课。
考查情态动词辨析。must一定；can能够；may可能；need需要。根据“It’s their
English class now”可知，此处表示十分有把握的肯定推测，应用must，故选A。
6．—Selina, I want to learn something about the Winter Olympic Games in Beijing.
—Frank ________ know it, because he cares best about it.
A．has to B．must C．can’t D．might
【答案】B
【详解】句意：——Selina，我想了解一些关于北京冬季奥运会的事情。——Frank一
定知道，因为他最关心它。
考查动词辨析。has to不得不；must一定；can’t不可能；might可能。根据“because
he cares best about it”可知，此处表示非常肯定的推测，故选B。
7．—You mustn’t go there on your own, because you ________ get lost in the mountains.
一OK. I will wait until you have time.
A．might B．should C．need D．must
【答案】A
【详解】句意：——你不能独自去那里，因为你可能会在山里迷路。——好。我会等
到你有时间。
考查情态动词词义辨析。might可能；should应该；need需要；must必须，一定。由句
中”because you...get lost”可知，此句是说可能会在山里迷路，故选A。
8．Nick was too excited to fall ________ after he heard of the news, so he was still
________ till 12 last night.
A．awake; asleep B．sleepy; awake C．asleep; awake D．awake; sleep
【答案】C
【详解】句意：尼克听到这个消息后兴奋得睡不着觉，所以他直到昨晚12点还是清醒
的。考查形容词辨析。asleep睡着的；awake醒着的；sleepy困倦的；sleep睡觉，动词。
fall asleep入睡，固定搭配。根据“Nick was too excited to fall…after he heard of the
news,”判断，尼克应该是激动的难以入睡，因此第一个空用asleep；根据“he was
still…till 12 last night.”可知，第二个空指到了12点，尼克仍然是醒着的。故选C。
9．There are many people waiting to buy seafood. I’m sure it ________ be delicious.
A．can B．could C．may D．must
【答案】D
【详解】句意：有很多人在等着买海鲜。我肯定它一定很好吃。
考查情态动词。can可能，表推测常用于否定句；could可能，can的过去式；may可能，
语气较弱；must一定，必须。根据“There are many people waiting to buy seafood.”可知
是是语气强烈的肯定推测，用must。故选D。
10．Dad signed for a package (包裹) just now. I’m sure it ________ be a “Bing Dwen
Dwen” from my uncle in Beijing.
A．may B．should C．must D．can
【答案】C
【详解】句意：爸爸刚刚签收了一个包裹。我敢肯定这一定是我北京叔叔送的“冰墩
墩”。
考查情态动词。may可以；should应该；must必须、一定；can能。根据“I’m sure”可
知我很肯定，应是“一定”。故选C。
能力提升
二、多句选词填空
用方框中所给的情态动词填空。
must might can’t could may
11．—Whose skirt is this?
— I think it _____________ be Anna’s. She is the only girl who wears a skirt in our class.
12．—Whose earring is this?
—It _____________ be Alice’s, she wears earrings sometimes.
13．—Whose jeans are these? I found them on the chair in the living room.
—They _____________ be mine. I put all my jeans on my bed.
14．—Is this Jim’s football?
—Yes, it _____________ be his, and here is his name on it.
15．We _____________ go to the great Wall this winter, but I’m not sure.【答案】11．must 12．might 13．can’t 14．must 15．may
【分析】11．句意：——这是谁的裙子？——我认为它一定是Anna的。她是我们班唯
一穿裙子的女孩。根据“She is the only girl who wears a skirt in our class”可知，推测一
定是Anna的，有把握的肯定推测用must，故填must。
12．句意：——这是谁的耳环？——它可能是Alice的，她有时戴耳环。根据“ she
wears earrings sometimes.”可推断，可能是Alice的，可能性比较小的推测用might，故
填might。
13．句意：——这些是谁的牛仔裤？我在客厅的椅子上找到的。——它们不可能是我
的。我把所有的牛仔裤都放在床上了。根据“I found them on the chair in the living
room.”及“I put all my jeans on my bed”可推断，放在客厅椅子上的牛仔裤一定不是我的，
否定推测用can’t，故填can’t。
14．句意：——这是Jim的足球吗？——是的，它一定是他的，他的名字在上面。根
据“here is his name on it”可知，一定是他的，有把握的肯定推测用must，故填must。
15．句意：今年冬天我们可能去长城，但我不确定。根据“but I’m not sure”可知，可
能去，也可能不去，用may表推测，故填may。
根据语境从括号内选择正确的情态动词填空。
16．Put on more clothes. You _____(must / can't) be feeling cold with only a shirt on.
17．There are some grey clouds in the sky. It _____(may not / might) rain later.
18．Everyone is leaving the office. It _____(couldn't / must) be the end of the day.
19．The lights in their apartment are all off. They're not answering the phone. They
_____(must / can't) be at home.
20．James _____(may not / can't) come to the party. He said he wasn't certain what his plans
were.
21．I thought I heard a knock on the door. It _____(must / could) be my little brother. He
usually comes home around now. Or it _____(might / must) be my mother. It _____(can't /
might not) be my father. He never knocks.
22．Where have I put my keys? They _____(can't / must) have walked away. They
_____(must / may) be near the sink (洗脸盆), since I washed my hands when I came in from
the garden. Or they _____(could / must) be in the pocket of my gardening pants.
【答案】16．must 17．might 18．must 19．can't 20．may not 21．could might can't 22． can't may could
【解析】16．句意：多穿点衣服。只穿一件衬衫你一定会感觉很冷。
must一定，准是，表示推测，只用于肯定句中；can’t不可能，表示否定的推测。根据
句意Put on more clothes可知，这里应表示肯定的意思，故填must。
17．句意：天空中有一些灰色的云，一会儿可能会下雨。
may not可能不；might可能。两个词都可以表示推测，语气比较弱。根据句意There
are some grey clouds in the sky可知，这里应该是肯定的推测，故填might。
18．句意：大家都在离开办公室，这一天一定是结束了。
couldn’t不可能；must一定，表示推测，用于肯定句中。根据句意Everyone is leaving
the office可知，大家都在离开，说明下班了，故这里是肯定的推测，填must。
19．句意：他们公寓里的等都灭了，他们没有接电话，他们一定没有在家。
can’t不可能，一定不；must一定，肯定。根据句意The lights in their apartment are all
off. They're not answering the phone可知，这里表示否定的推测，故应填can’t。
20．句意：James可能不来参加聚会，他说他不确定他的计划。
may not可能不，语气较弱；can’t不可能，语气非常强。根据句意He said he wasn't
certain what his plans were.可知，这里表示的推测语气较弱，故应填may not。
21．句意：我想我听到了敲门声，可能是我的弟弟，他通常这个时候回家。或者可能
是我的妈妈，不可能是我的爸爸，他从不敲门。
第一个空must肯定；could可能。根据句意可知，这里没有十足的把握说一定是…，
故应填could；第二个空用might也表示语气弱，“可能”；第三个空用can’t表示“不
可能”，语气较强，因为后面说了He never knocks，他的爸爸从来不敲门，所以一定
不是他。
22．句意：我把钥匙放在哪儿了？他们不可能走开了。他们可能在洗脸盆附近，因为
我从花园进来的时候洗手了。或者他们可能在我园艺裤的口袋里。
根据句意可知，钥匙不会走路，故第一个空表示非常肯定的推测，应填can’t不可能；
第二个空和第三个空都表示猜测，没有确切的依据，只是有可能，故第二个空填
may“可能”；第三个空填could，也表示“可能”；must是一定，语气非常肯定，不
符合句意。
【点睛】这个题目主要考查了情态动词表示推测的用法。must一定，肯定，准是，表
示非常有把握的推测，只能用于肯定句中；can’t不可能，一定不，语气较强，用于否
定句中；may, might或者could都表示“可能”，语气较弱，肯定句或者否定句都可以。
例如第4小题，根据句意The lights in their apartment are all off. They're not answering thephone可知，这里列出了两个理由，所以对推测的事情很有把握，且表示否定的，故应
填can’t。再如第7小题，根据句意可知，钥匙不会走路，故第一个空表示非常肯定的
推测，应填can’t不可能；第二个空和第三个空都表示猜测，没有确切的依据，只是有
可能，故第二个空填may“可能”；第三个空填could，也表示“可能”；must是一定，
语气非常肯定，不符合句意。
拓展训练
三、完形填空(共0分)
In 1912, a man called Wilfrid Voynich bought a number of books in Italy. He bought so
many that he didn’t look very ___23___ at the books. When he arrived home, he ___24___
he had bought a very strange handwritten manuscript (手写稿). It was written ___25___ a
language he had never seen before. It was also full of pictures of plants.
Since then, the book — now known as the Voynich Manuscript — has ___26___ the
world’s most mysterious (神秘的) manuscript. Many people have studied it. However, no one
has ever discovered its meaning and ___27___.
There are many ideas about ___28___ wrote it and why. Some say that a famous
scientist like Francis Bacon wrote it. Some think it could be a religious (宗教的) text. Others
think the manuscript is a hoax (骗局) and ___29___ nothing at all.
Scientists have learned that the manuscript was made between 1404 and 1438. However,
this only tells us how ___30___ the paper is, not when the book was written. But there’s still
hope. After all, the manuscript is real and there’s meaning to its words.
The Voynich Manuscript remains a mystery today. You can go online to find it
___31___ you would like to know the truth. Are you _____32_____ in it? Then please look
up some information about it on the Internet.
23．A．quietly B．easily C．carefully D．differently
24．A．argued B．hoped C．decided D．discovered
25．A．of B．in C．as D．among
26．A．remained B．created C．listed D．mentioned
27．A．customer B．visitor C．reader D．writer
28．A．what B．who C．when D．how
29．A．knows B．speaks C．gives D．means
30．A．young B．new C．old D．far
31．A．unless B．though C．if D．until32．A．interested B．excited C．relaxed D．tired
【答案】
23．C 24．D 25．B 26．A 27．D 28．B 29．D 30．C 31．C 32．A
【导语】本文主要介绍了伏尼契手稿，它是一本内容不明的神秘书籍，附有插图，而
书中所有字母及语言无人能够识别。本文也展开讲述了人们对于它的各种猜测。
23．句意：他买了那么多书，以至于没有仔细看这些书。
quietly安静地；easily容易地；carefully仔细地；differently不同地。根据文中的句子
“He bought so many”可知，他买的书多，没仔细看。故选C。
24．句意：他发现自己买了一份非常奇怪的手写稿。
argued争论；hoped希望；decided决定；discovered发现。结合前文“He bought so
many that he didn’t look very carefully at the books.”可知，因为买的书多，没仔细看，到
家才发现有一份手写稿。故选D。
25．句意：这是用他从未见过的语言写的。
of……的；in用；as像；among在……之间。根据“a language”可知，这里表示的是用
某种语言。用介词in。故选B。
26．句意：这本书——现在被称为伏尼契手稿——仍然是世界上最神秘的手稿。
remained仍然是；created创造；listed列举；mentioned提到。根据文中的句子“Since
then, ... the world’s most mysterious manuscript.”可知，这个手稿到现在一直都是最神秘
的手稿。故选A。
27．句意：然而，没有人发现它的意义和作者。
customer顾客；visitor参观者；reader读者；writer作者。根据下文的“Some say that a
famous scientist like Francis Bacon wrote it.”可知，人们并不知道它的作者是谁。故选
D。
28．句意：关于是谁写的以及为什么写，有很多想法。
what什么；who谁；when什么时候；how怎样。根据文中的句子“Some say that a
famous scientist like Francis Bacon wrote it.”可知，对于手稿是谁写的有许多不同的看法。
故选B。
29．句意：另一些人认为手稿是个骗局，毫无意义。
knows知道；speaks说；gives给；means意思是。根据“Others think the manuscript is a
hoax”可推知，那些人觉得这些手稿根本就是没意义的。故选D。
30．句意：然而，这只是告诉我们这张纸的年代，而不是这本书是什么时候写的。young年轻的；new新的；old老的；far远。根据“the manuscript was made between
1404 and 1438”可知，这个信息能告诉我们手写稿的年份。故选C。
31．句意：如果你想知道真相，你可以在网上找到它。
unless除非；though尽管；if如果；until直到。句子“You can go online to find it”和
“you would like to know the truth.”是条件关系。结合选项可知，这里是if引导的条件
状语从句符合题意。故选C。
32．句意：你对它感兴趣吗？
interested感兴趣的；excited兴奋的；relaxed放松的；tired疲劳的。观察句子结构可知，
本题考查短语be interested in“对……感兴趣”。故选A
