20. I’m afraid your suggestion can’t help ________ the service of their shop.

　 A. improving　　　 　　　 B. improve　　　 C. in improving　　　 D. for improving

19. Peter is one of those men who I am sure always do _________ best even in the most difficult situations.

　 A. his　　 B. your　　　 C. their　　 D. one’s

18. The little girl __________ out in the dark at night.

　 A. dares not go　　 　　　　　 B. dare not go　　　 C. does not dare going　　 D. dares not to go

17. English and French are taught here. You can choose ________ you like.

A. no matter which　　 　　 B. no matter what　　　 C. whichever　　　 D. whatever