21. The question is very easy. ___ can answer it.

　 A. Somebody　 B. Anybody　 C. Nobody　 D. Only a few

20. All these are interesting books. You can borrow ___ of them.

　 A. both　 B. either　　 C. neither　 D. any

19. They are both interesting books. You can read ___ of them.

　 A. all　 B. any　 C. either　 D. every

18. It is as good a bicycle as ___.

　 A. none　 B. any　 C. no　 D. neither

17. If you need money, he can lend you ___.

　 A. some　 B. it　 C. one　 　D. those

16. Do you have any pencils? I’d like to borrow ___.

　 A. that　 B. any　 C.it　 D. one

15. Everyone should solve ___ own problem within the limited time.

　 A. one’s　 B. his　 C. their　 D. ones

14. One can always find something to enjoy ___.

　 A. himself　 B. itself　 C. oneself　 D. themselves

13. The nights in winter are longer than ___ in summer.

　 A. those　　 B. these　 C. it　 D. that

12. The population of our city is larger than ___ of theirs.

　 A. the one　 B. this　 C. those　 D. that