Now in some places of our country, many people are cutting down (砍伐) the trees in the forests. They need more ? ? to build houses and more farmland to grow crops and so on. The areas of forests are getting ? . Some scientists say that there ? ? no big forests in 20 or 30 years. It is really a(n)? thing. ? ? the forests, we will have sandstorms (沙尘暴) often. The weather will get ? ? . The earth will become a big desert (沙漠). A lot of plants and animals will ? . Crops will not grow anywhere. Life will be ? for everyone.

So we should do our best ? ? our living environment and keep our mountains ? ? , the water clean, and the sky blue.

1.A. wood????????????? B. money????????????? C. deserts????????????? D. leaves

2.A. bigger and bigger B. less and less?? C. smaller and smaller????????????? D. more and more

3.A. has????????????? B. have????????????? C. will have????????????? D. will be

4.A. excited????????????? B. happy????????????? C. better????????????? D. terrible

5.A. With????????????? B. Under????????????? C. Within????????????? D. Without

6.A. wet and cold????????????? B. hot and dry????????????? C. cold and dry?? ??? D. hot and wet

7.A. come????????????? B. live????????????? C. die????????????? ????????????? D. turn

8.A. difficult????????????? B. easy????????????? C. enjoyable????????????? D. poor

9.A. protect????????????? B. to protect????????????? C. protecting????????????? D. protected

10.A. clear????????????? B. fresh????????????? C. green????????????? D. blue

阅读下面短文，根据短文内容及首字母提示补全文中所缺的单词。

Nowadays we can see that many people are cutting down the trees in the forests．A lot of rich land has become deserts．If we r  1  newspapers，we’ll learn that the forests on the earth are getting smaller all the time．People are cutting down large numbers of trees b  2  they need wood and farmland．Some scientists say that there will n  3  be any great forests in 20 or 30 years．

What will h  4  if the forests disappear? A lot of plants will die and animals will lose their home．In many places the new farmland will soon look like the old deserts．Crops will not grow there．There won’t be e  5  rain．and the weather will get hot and d  6  ．If the climate（气候）of the earth changes，life will be hard for everyone．Our living environment，will become w  7  ．More and more rich farmland will disappear．We will suffer（遭受）a lot from b  8  floods and droughts．

It’s our duty to p  9  the forests well．Everyone should try his best to make a contribution to taking care of the forests．Let’s s  10  cutting down the trees and make the world greener!

    Years ago, many zoos kept all kinds of animals in small cages (笼子). Small cages made it e 1  for people to see the animals, but a small cage is not a good place for an animal to l  2  in.

    Today zoos keep animals in d  3  kinds of cages. The cages are very b  4  and open. They usually have plants and a little lake. The c  5   look like the animals’ wild habitats (栖息地).

    Zoos help to p  6  all kinds of animals. They protect animals in the zoo and they protect animals in the wild. How do they do this? Zoos show people h  7  animals live in the wild.

    Many plants and animals are going extinct. Mammoths, which are related (有关联的) with Asia elephants, are now extinct. There are n  8  mammoths in the world today. Scientists s  9     that seventy-four different kinds of living things go extinct every day!

    Zoos are working together to s  10  animals from going extinct.