13. Human beings are different from animals _____ they can use language as a tool to communicate.

　 A. in that　 B. for that　　 C. in which　 D. for which

12. The question _______ we can get enough coal for the winter has not been cleared up yet .

　 A. that　　 B. if　 C. which　 D. whether

11. _____ so much electrical equipment , wood and paper in one place , there is a danger of fire .

　 A. For　　 B. In　　 C. With　 D. By

10. --- ________ for the glass!

　 --- It’s OK. I’m wearing shoes .

　 A. Look out　 B. Walk out　 C. Go out　 D. Set out

9. --- What about the books ?

　 --- Books of this kind ______ well .

　 A. sell　　 B. sells　　 C. are sold　 D. is sold

8. Some people thought ________ possible to live on out space in the future .

　 A. it　 B. it be　 C. it is　 D. that is

7. Why ! I have nothing to confess . ________ you want me to say ?

　 A. What is it that　 B. What it is that　 C. How is it that　　 D. How it is that

6. Because the shop ______, all the T-shirts are sold at half price .

　 A. has closed down　 B. closed down　 C. is closing down　 D. had closed down

5. _____ number of foreign guests were invited to the meeting , and _____ total number was over twenty .

　 A.　 A; a　　 B. The ; /　　 C. The ; a　　 D. A ; the

4. --- Betty , welcome to my birthday party . Please make yourself at home .

　--- ________.

　 A. The same to you　 B. No , not really　 C. Thank you　 D. Here you are