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完形填空。

     There are seas, lakes and forests on the earth. There are cities, towns and farms, too. All these things
are environments. The environment is everything around you. It can be living (有生命的), like a forest.
It can be non-living (无生命的),   1   a rock or a mountain.
     No living thing can live alone. Every living thing depends (依赖于) on other things in its environment.
When something   2 , it affects (影响) something else. If a non-living; thing like water becomes   3   to
find, plants will be affected. If all plants   4 , the animals that eat plants will be affected.
     Weather, such as temperature, wind and rain, can change an environment.   5   can change an
environment, too. Some things that people do cause no change or only a small change in the environment.
For example, people can walk through the forest and just travel around. They can cut down only a few
trees and   6   change the environment very much. On the other hand, some things that people do
cause   7   changes. Sometimes they can change a whole environment by cutting down a forest.
      Not all changes are bad. If we cut down a forest to build houses or plant crops, this may not be bad.
But what would happen if we cut down all trees in all forests or if we didn't   8   them and plant something
else?
     It is clear that people are able to change an environment. This is why it is important to think about the
changes before we make   9 . Let's work together to  10  it clean and healthy.

(     )1.A. with
(     )2.A. lives
(     )3.A. dry
(     )4.A. live
(     )5.A. Those
(     )6.A. still not
(     )7.A. little
(     )8.A. use
(     )9.A. it
(     )10.A. change

B. like
B. becomes
B. difficult
B. lose
B. Plants
B. still
B. a lot of
B. build
B. them
B. keep

C. on
C. changes
C. easy
C. die
C. People
C. even
C. a small
C. save
C. that
C. have

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完形填空

　　There are seas, lakes and forests on the earth. There are dries, towns and farms, too. All these things are environments. The environment is everything around you. It can be living, like a forest. It can be non-living, __1__ a rock or a mountain.

　　No living thing can live alone. Every living thing depends on（依靠）__2__ things in its environment. When something changes, it affects something else. If a non-living thing like water becomes __3__ to find, plants will be affected（影响）. If all plants die, the animals that eat plants will be affected.

　　Weather, such as temperature, wind and rain, can change an environment. __4__ can change an environment, too. Some things that people do cause no change or only a small change in the environment. For example, people can __5__ the forest and just travel around. They can cut down only a few trees and still not change the environment very much.

　　On the other hand some things that people do cause __6__ changes. Sometimes they can change a whole environment by cutting down a forest.

　　__7__ changes are bad. If we cut down a forest to build houses or plant crops, this may not be bad. But what would happen if we cut down all trees in all forests __8__ these things or if we didn't save some and plant something else?

　　It is clear that people are able to __9__ an environment. This is why it is important to think about the changes before we make them. Let's all work together to __10__ it clean and healthy.

(1) A．with	B．like		C．on
(2) A．all	B．its		C．other
(3) A．less	B．easy		C．difficult
(4) A．Plants	B．Animals		C．People
(5) A．walk through		B．cut down
C．find out
(6) A．little	B．a lot of		C．a small
(7) A．Not all	B．Not every		C．All
(8) A．to do	B．doing		C．does
(9) A．develop	B．break		C．change
(10) A．change	B．keep		C．have

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阅读理解

High in the mountains, and deep in the forest, lives a lake with many plants and animals in and around her. The plants and animals have enough food and clean water to keep them healthy. The wind carries pure air, and the rain comes down clear and clean.

But recently, Lucy Lake and her friends haven’t been feeling very well. All the plants and animals get together to talk about the problem. “Why are we sick?” “What can we do?” ask all of them. No one has any answers.

Just then two hikers appear. The animals tell them about their problems. “Can you help us?” they ask. “Yes,” one hiker says. “I think it’s because of acid rain.”

“Acid rain comes from chemicals(化学物质) in the air. The pollution comes from factories, cars and trucks.”

“So, although I don’t want to, I help the pollution travel through the air!” says the wind. “And I carry it to the land!” cries the rain.

“If you can help us think of some solutions(解决方法), we will send a message to tell people how to clean up our environment,” one hiker says.

With the help of the plants and animals, the two hikers make a list of ideas for saving Lucy Lake and her friends.

Time passes, and the forest and lake begin to feel a little better.

The next time the hikers climb up the mountains to Lucy Lake, they smile at what they find. “We’re glad things have started to change,” one hiker says. “And we’re glad you helped us make a difference,” says the other.

1.The underlined word “pure” can be replaced by “____”.

A．polluted

B．clean

C．cold

D．cool

2.The two hikers are most probably ____.

A．scientists

B．teachers

C．doctors

D．reporters

3.____ have (has) nothing to do with the cause of acid rain.

A．The rain

B．Human beings

C．The wind

D．The plants and animals

4.The underlined word “you” refers to (指) ____.

A．Lucy Lake	B．the plants and animals
C．one of the two hikers	D．the wind and the rain

5.Which of the following is NOT true?

A．Acid rain is very harmful only to plants and animals.

B．Human activities are the main cause of acid rain.

C．Acid rain can make the living things in the environment get sick.

D．We should clean up our environment to protect us against acid rain.

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Complete the conversation with the correct form of the phrases in the box：

　　Mike：I hear you’re off to the Caribbean for a long holiday!Lucky you!But aren’t you 　　1　　 the dangers of such long flights on the environment?

　　Ken：Why should I be worried?

　　Mike：Planes cause 　　2　　．

　　Ken：I know, but what can I do about it?I already try my best to 　　3　　．I recycle, I don’t just 　　4　　 things if I don’t want them any more．I 　　5　　 the lights when I leave a room．Don’t tell me we shouldn’t travel by plane any more!

　　Mike：No, of course not．But there is something we can do about it．Have you 　　6　　 futureforests.com?It’s an environmental group that helps to 　　7　　 By planting more trees, We can help keep the air clean, because trees 　　8　　 the environment．In this way, we can reduce the dangers of pollution．

　　Ken：Good!So I can enjoy my holiday, and when I come back, I’ll 　　9　　!

　　Mike：That’s the idea!Maybe we can all 　　10　　 and start a small forest!

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根据对话内容，用方框中所给短语的适当形式填空。

be good for hear of be off turn off a lot of pollution worry about
plant some trees join in look after throw away

Mike: I hear you    1   to the Caribbean for a long holiday! Lucky you! But aren't you    2    the dangers
         of such long flights on the environment?
Ken: Why should I be worried?
Mike: Planes cause    3   .
Ken: I know, but what can I do about it? I already try my best to protect the environment. I recycle,
        and I don't just    4    things if I don't want them any more. I    5    the lights when I leave a room.
        Don't tell me we shouldn't travel by plane any more!
Mike: No, of course not. But there is something we can do about it. Have you    6    future forests
           company? It's an environmental group that helps to    7    trees. By planting more trees, We can
           help keep the air clean, because trees    8    the environment. In this way, we can reduce the
          dangers of pollution.
Ken: Good! So I can enjoy my holiday, and when I come back, I    9   !
Mike: That's a good idea! Maybe we can all   10    and start a small forest!

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