21. I will do my best ________ the environment.

　　 A. protect　　　　　　 B. to protect　　　 C. protecting

20. The song was very popular ____________.

　　 A. in the 1990s　　　　 B. in 1990s　　　 C. in the 1990

19. Joining the CPC is ______ honour to me.

　　　　 A. a　　　　　　　　　 B. an　　　　　　　　 C. /

18. Yao Ming is one of __________ in NBA.

　　　　 A. the tallest player　　　 B. the tallest players　　 C. the taller players

17. Lei Feng ______ a good example to us. We should learn from him.

　　　　 A. made　　　　　　　　 B. set　　　 　　　　　C. did

16. _____ is said that Jay Chou will give a single concert in Jinjiang Gym.

　　　　 A. It　　　　　　　　　　 B. One　　　　　　　 C. That

15. He was late of the meeting _________ heavy rain.

　　　　 A. because　　　　　　　　　 B. because of　　　　　　 C. since

14. Mr. Wang, together with his students, ______ going on a trip next week.

　　　　 A. is　　　　　　　　　　　　 B. are　　　　　　　　　 C. were

13. He devoted himself　 ________ other people that are in trouble.

　　　　 A.to helping　　　　　　　 B. to help　　　　　　 C. help

12. President Hu ________ an idea on how to enlarge the development between Asian countries in the APEC meeting.

　　　　 A. came back　　　　　　 B. came out　　　　　 C. came up with