文档内容
Unit 13 I’m trying to save the earth.
第四课时(分层作业)
基础达标
一、多句选词填空
用方框中所给单词的适当形式填空
harm，fisherman，science，wood，buy
1．There’s a ________ boat in the middle of the lake.
2．The pollution is ________ to all the life on the earth.
3．All the ________ are not allowed to catch fish in this area.
4．We found out the truth by doing a lot of ________ experiments.
5．I can’t afford ________ that book because it is too expensive.
二、按要求完成句子
6．He used to go fishing by the lake every weekend. （对画线部分提问）
________ ________ he ________ to do every weekend?
7．I don’t agree that we should cut down too many trees. （改为简单句）
I am ________ cutting down too many trees.
8．Tom doesn’t have enough money to buy that violin. （改为同义句）
Tom ________ ________ ________ buy that violin.
9．How much did she pay for the dress?（改为同义句）
How much ________ the dress ________ her?
10．She is not a music lover anymore. （改为同义句）
She is ________ ________ a music lover.
能力提升
三、单项选择
11．—This is really _______ ugly bird.
—But it is _______ useful bird. It can help fishermen catch fish.
A．an; a B．an; an C．a; a D．a; an
12．If you can speak English well, you will have a great ________ over others when looking
for a job.
A．activity B．advantage C．attention D．action
13．Throwing rubbish into the river is ________ to the fish in it.
A．useful B．beautiful C．harmful D．meaningful
14．—Mr. Huang, it’s late. Why are you still here?—My daughter hasn’t come back from school yet. I am ________ for her.
A．calling B．waiting C．asking D．hoping
15．This book is the most ________ that I have ever read. I can’t put it down.
A．boring B．difficult C．fantastic D．dangerous
16．Don’t throw away the waste paper. It needs ________.
A．taking B．recycling C．keeping D．remaining
17．Now many wild animals are in danger. If we don’t ________ to protect them, it will be
hard for us to see them in the near future.
A．leave out B．call up C．take action D．give up
18．—We are supposed to recycle paper and bottles.It can help protect the environment.
—________.It can save money，too.
A．It's nothing B．Best wishes C．I agree D．All right
19．We find ________ hard to do a job very well.
A．this B．that C．it D．these
20．—What should I do to be a green man?
—It is easy.For example，________ your own bags when ________.
A．take；shopping B．taking；shopping
C．taking；you shopping D．take；you shopping
21．—Why haven’t you bought a car, Mr Lin? You can one.
—Well, I have money for it, but I want to go green.
A．offer B．afford C．avoid D．allow
22．—Now people have to pay some money for bags in supermarkets.
—Yes. Because they are bad for the environment.
A．bin B．paper C．cloth D．plastic
23．We should try our best to solve pollution problems ________ complaining them.
A．rather than B．instead of C．for D．or
24．—Everyone should use both sides of paper.
—Yes. If we all use both sides of paper, many trees ________ be saved.
A．need B．have to C．can D．must
25．—Don’t keep the water running while brushing your teeth.
—Sorry. I forgot to ________.
A．turn on it B．turn it on C．turn off it D．turn it off
26．—How shall we go to the airport?
—Let’s take the airport bus. It ____ only 20 minutes and ______ much less than taking a taxi.
A．takes；costs B．spends；spends C．spends；costs D．takes；spends27．—There ________ lots of trees in the area.
—But they have all gone because people built a railway here.
A．have been B．used to be C．have had D．used to have
28．—I think the biggest environmental problem in my country is air pollution.
—________. The air here is much more polluted than in my country.
A．Not really B．Me, too C．Yes, I agree D．It doesn’t
matter
29．Recycling is good, so don't ______ bottles or newspapers.
A．find out B．hand in C．use up D．throw away
30．—Do you often use paper napkins?
—Seldom，________ they are cheap and easy to get.
A．since B．although C．because D．if
拓展训练
四、完形填空
I am Grace Cortese，and I am 10 years old.I believe I can make a difference in ___31___
the environment，because my science teacher，Mrs.Esby，tells us that there are many
things we can do to help protect the environment ___32___ we are willing to change our
habits.
Every year at my birthday party，I ___33___ charitable donations instead of gifts.When I
was eight，I asked my friends to donate to the Natural Resources Defense Council to save
the polar bears.I ___34___ almost $150.Last year，my friend，Mary，also did
that.Imagine how much money we could raise to save the environment if everyone asked for
charitable donations ___35___ their birthdays!
My whole ___36___ is doing things to help protect the earth，too.Our school makes a
carpooling(合伙用车)program to reduce the number of cars on the road，and we have a
“Walk to School” day once a year.___37___ science teacher，Mrs.Esby，has a “Teenie
Greenies” club at lunch and she teaches a class on how to recycle after school.And we
___38___ do beach clean－up.
If you ___39___ to do something for the environment，look through the website Grades of
Green.It is ___40___ of great ideas for us to reduce，reuse and recycle waste，and it also
has a lot of really interesting facts.
31．A．using B．protecting C．cleaning D．preventing
32．A．even if B．until C．because D．if
33．A．ask for B．look for C．pay for D．send for34．A．sold B．borrowed C．raised D．rented
35．A．to B．for C．with D．off
36．A．school B．home C．factory D．office
37．A．Her B．His C．Your D．My
38．A．still B．yet C．also D．already
39．A．want B．consider C．enjoy D．refuse
40．A．short B．full C．tired D．fond
五 、阅读还原6选5 根据短文内容，从方框内所给的选项中选出能填入空白处的最
佳选项，使短文意思通顺。选项中有一项为多余项。
You may be worrying about the environment and trying to change your lifestyle，for
example，riding to school or taking a shopping bag and so on.But do you know we could
have a real influence on the environment and climate(气候) change by eating less meat?
___41___ Studies have shown that keeping animals for human produces lots of
greenhouse gases(温室气体)．It's even more than all of the carbon dioxide produced by
boats，planes and trains in total around the world.Beef is worse for the environment than the
other meats.___42___ However，in some countries，beef is the most-loved meat.By
2050，there will be three billion meat-eater.That means more resources will be needed like
land，water and food.
On the other hand，it would be too difficult for meat lovers to completely give up
meat.___43___ They could at first consider chicken and fish instead of red meat，such as
beef，mutton and pork.This is because productions of chicken and fish have a much less
influence on the environment.What's more，eating more fish is good for their
brain.___44___ For example，you can eat meat on only one day of the week.___45___
Some believe that it is a healthier lifestyle while some hope to protect the
environment.Anyway，we know 2015 is the hottest year in recorded history，so it's time to
think of a good way to both keep fit and help the environment.
A．Here are two steps they can follow.
B．Because lots of trees are cut down for more land for cows.
C．People stop eating meat for different reasons.
D．And they don't want to keep away from meat.
E．Then try to cut down the times of eating meat.
F．In fact，giving up meat can do much to save our planet.
