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

完形填空

先阅读短文，掌握其大意，然后从A、B、C、D四个选项中选出一个可以填入相应空白处的最佳答案．

　　There are seas, lakes and forests on the earth. There are cities, towns and farms, 1 . All these things are environments(环境). 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), 2 a rock or a mountain.

　　No living thing can live 3 . Every living thing depends(依靠) on 4 things in its environment. When something 5 , it affects(影响) something else. If a non-living thing like water becomes 6 to find, plants will be affected. If all plants 7 , the animals that eat plants will be affected.

　　Weather, such as(例如) temperature, wind and rain, can change an environment. 8 can change an environment, too. Some things that people do cause(引起) 9 change or only a small change in the environment. For example, people can 10 the forest and just travel around. They can cut down only a few trees and 11 change the environment very much. On the other hand(另一方面), some things that people do cause 12 change. Sometimes they can change 13 environment by cutting down a forest.

　　 14 changes are bad. If we cut down a forest to build houses or plant crops(庄稼), this may not be 15 . But what would happen if we cut down all trees in all forests 16 these things or if we didn't 17 some and plant something else?

　　It is clear that people are able to 18 an environment. This is why it is important to think about the changes before we make 19 . Let's all work together to 20 it clean and healthy.

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