15. discovered,years,it, that,endangered,about,forty,was,pandas,ago,were 

14. in,polluted,become,river,village,the,our,has 

13. tigers,used,there,be, here,many,to 

12. 1000,10. are,manatees,about,pounds,feet,weigh,long,and,they,about 

11. talking,the,they,environment,are,about,save,to, how 

(   ) 6. 一Where is your brother,Jim? 

        ―He        to Wuhan.

   A. went   B. has gone   C. goes   D. has been

(   ) 7. ―Did you see your sister come in?

       —Sorry,sir. I        basketball with my friends at that time.

   A. played   B. will play   C. was playing   D. am playing

(   ) 8. —Do you know that animals in the zoos        in small cages?

     ―Don't you think it's a good way for them to live?

   A. keep   B. are kept   C. living   D. are feeding

(   ) 9. ―The city has changed a lot.

一Sure!There        many old buildings,but now you can't see them.

   A. be used to being   B. used to be

   C. were used to being   D. are used to be

(   ) 10. A habitat is a place        animals and plants live in.

   A. where   B. that   C. what   D. there

1. 像一只大象                 2. 濒危动物                 

3. 过去经常                 4. 10 feet long               

5. try to do                 

3. 人们相信动物是我们的朋友。

It                  that animals are our friends.

2. 我相信他参观过很多动物园。

I believe that he              many zoos.

1. 我认为动物园为濒危动物提供了安全的居住地。

I think that zoos             for endangered animals to live.