20. The news came as no surprise to me, for I _______of it earlier.

　A. hear　　　　　　 B. heard　　　　　 C. had heard　　　 D. have heard

19. We’ll arrive in_______ European country in half ___________ hour.

　 　　 A. a; an　　　　　　　 B. an; an　　　　　　 C. a; a　　　　　　　 D. an; a

18. _______, and the problem will be straightened out.

　 　　 A. There being a little effort　　　　　　　　 B. Having a little effort　

C. If you have a bit more effort　　 　　 　　　　D. A bit more effort

17. -- Have you moved into the new house?

　 -- Not yet. The rooms _______.

A. are painting　　　　　　　　　　　　　　 B. are being painted

C. are painted　　　　　　　　　　　　　　 D. are being painting

16. The United States _______one of the lowest smoking rates －25.5 percent of the population.

A. is　　　　　　　　 B. have　　　　　　　 C. has　　　　　　　 D. are

15. That bicycle doesn't _______to Peter.

　 A. owe　　　　　　　 B. afford　　　　　　 D .lend　　　　　　　 D. belong

14. ---I want to apologize for us all.

　 ---_______ .

A. Don't think more about it　　　　　　　　 B. It's very kind of you to say that

　 C. Thank you very much　　　　　　　　　 D. It doesn't matter