21. Let’s move that bag, ______ there may be an accident.

　 A. or　　　　　　　 B. but　　　　　　 C. and　　　　　　 D. because

20. ---Will you go to the museum tomorrow?　 ---I will if I ______ no visitors.

　 A. have　　　　　　 B. shall have　　　 C. will have　　　　 D. am having

19. You can talk with anyone ______ you think is friendly.

　 A. who　　　　　　 B. whom　　　　　 C. which　　　　　 D. that

18. Whenever you ______, you should do something good for yourself, go shopping, do something kind for others or try to think more positively(积极地).

　 A. feel blue　　　　 B. feel green　　　 C. feel red　　　　 D. feel black

17. ---Will you help me repair my bike?　 ---______.

　 A. Yes, but I’m busy now　　　　　　　 B. No, thanks

　 C. Certainly, I’ll be glad to　　　　　　　 D. Of course, I would like

16. ---Do you know ______ Miss Yang will leave?　 ---Tomorrow morning.

　 A. when　　　　　 B. what　　　　　 C. who　　　　　 D. where

15. More than one student ______ go to the sea for summer holiday.

　 A. wants to　　　　 B. want to　　　　　 C. would like　　　 D. are going

14. ---Can you come to my birthday party?　　 ---______.

　 A. It doesn’t matter　 B. Yes, please come　 C. I’d love to　　　 D. Not at all

13.---Bob and Mike? I didn’t believe they could do the work. ---___, but they really did it well.

　 A. So did I　　　　 B. So I didn’t　　　 C. Me too　　　　 D. Neither did I

12. It’s over three weeks ______ he left home.

　 A. for　　　　　　 B. before　　　　 C. since　　　　　 D. because