20. He prefers _______ in the bookstore to watching TV at home.

　　　 A. to stay　　　　　　　　　　 B. stay　　　　　　　　　 C. staying　　　　　　　 D. to be stayed

19. China was one of the first countries in the world _________ the science of farming.

　　　 A. who was studied　　　　　　　 B. of study　　 C. studied　　　　　　　 D. to study

18. Could you give me a plastic bag _____________?

　　　 A. to put these things in　　　　　　　　　　　 B. to put these things

　　　 C. of putting things　　　　　　　　　　　　　　　　　 D. for putting things

17. This factory is ________ we visited with my friends last week.

　　　 A. which　　　　　　　 B. that　　　　　　　　　 C. on which　　　　　 D. the one

16.　 The date ________ he wrote down on the paper was wrong.

A. when　　　　　　　　 B. on that　　　　　　　　　　 C. which　　　　　　　 D. on which

15. Helen is always the first ____ to the office and the last _____.

A. of coming, of leaving　 B. comes, leaves　 C. to come, to leave　 D. coming, leaving

14. Would you mind ______ a try? ______.

A. having ,Yes, please　　 B. have, No, please　

C. me have, Yes, please　 D. my having, No, of course not

13. I’ll give him the note _________ I see him.

　　 A. until　　　　　　　　 B. after　　　　　　　　 C. the moment　　　　　　　 D. unless

12. ___ child as he is, his performance was outstanding yesterday. Everyone agrees that he is ____ expert on ___ piano.

　　 A. A… an… the　　 B. /… an … the　 C. A…an… /　 D. /… an… /

11.　 A _____ gave a brief ____ perspective on “ What is beautiful”

A. history; historic B. historical; historian　 C. historian; historical D. historic; historical