20. -Sir, I'd like to take a week's holiday.

　 -____. We' re too busy now.

A. Forget it　　　 B. Don' t mention it　 C. Don't worry　　　 D. Pardon me

19. -He looks very happy. He ____have passed the exam,

　 -I guess so. It's not difficult after all.

　　 A. should　　　　 B. could 　　　　　　　C. must　　　　　　　 D. might

18. Giving children pocket money as a gift during the Spring Festival is a common ____ in　　 China.

　　 A. sense　　　　　 B. practice　　　　　　 C. deed　　　　　　　 D. habit

17. -as your former classmate come back from the USA?

　　 -Yes, he ____ there for eight years.

　　 A. has stayed　　　 B. stays　　　　　　　 C. stayed　　　　　　　 D. had stayed

16. ____in a heavy snow, the couple had to walk home, leaving their car behind.

　　 A. Caught　　　　 B. Having caught　　　 C. Catching 　　　　　D. To catch

15. It is in the Future Mall where you bought a coat ____ her sister works.

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