20.Mike didn’t notice Alice entering his home .He___ a phone call.

A. answered　 　　B. has answered　 　　C. was answering 　　　D. is answering

19. _____, the idea of having to work under a woman defeated him.

A. Wanting the job very much　　　　　 　B. Although wanting the job badly

C. Though he wanted the job very much　 　D. He wanted the job badly

18. ---I have got a headache.

　 ---No wonder. You___ in　 front of that computer too long.

　A. work　 　B. are working　 C. have been working　 D. worked

17. Following the guide, we went into a house, ________wall hung a picture of Einstein.

A. on its　　　　 B. on that　　　 C. on whose　　　 D. on which

16. It is really stupid of you ________him the news yesterday. It has been disturbing him all the time.

A. having told　　 B. telling　　　 C. to tell　　　　 D. to have told