19. ________ you can’t finish it by yourself in a day, you can ask me for help.

　 A. Even if　　　 B. Unless　　　 C. So long as　　　 D. As far as

20 It was in the Ming dynasty ________ the Great Wall was rebuilt to keep out northern tribes ________ threatened the Chinese heartland.

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

18. My parents, ________ country life, wouldn’t like to move to the city to live with me.

　 A. addicted to　　 B. devoted to　　 C. exposed to　　 D. accustomed to

17. The company ________ that they would deliver my order within two days, which made me satisfied.

　 A. attempted　　 B. guaranteed　　 C. impressed　　　 D. predicted

16. ________ the fact that not enough exercise isn’t good for people’s health, taking too much exercise can also be harmful.

　 A. In place of　　 B. Instead of　　 C. In spite of　　　 D. In terms of

15. - I don’t stand a chance of getting the job.

　 - Don’t be silly; you mustn’t put yourself ________.

　 A. down　　　　 B. up　　　　 C. off　　　　 D. away

14. ________ himself in looking after the children, he had little time to finish his report.

　 A. Occupied　　　　　　　　 B. Occupying

　 C. Having been occupied　　　 D. Being occupied　

13. From ________ serious look on her face, we realized that she had brought us ________ word of great importance.

　 A. the; the　　　 B. the; a　　　　 C. a; the　　　　 D. the; /

12. - What are you up to these days?

- ________.

A. Not too good yet　　　　 B. Same as ever

C. So-so, thank you　　　　 D. All right