20. _____, I would have phoned you.

　A．If I knew it　 B．Had I known it　 C．If I know it　　 　 D．Did I know it

19. -He ought to have been warned of the danger.

-_____,but he wouldn’t listen to me.

　A.Yes,he ought to　 　　　 　　　 B.So he has 　C.So was he　 　　　 D.So it was with him

18. _____all scientists from Asia.

A.Were present at the meeting　 　　　　　　　　　　 B.Present at the meeting were

C.Are present at the meeting 　　　　　　　　　　　　 D.Present were at the meeting

17. ---Would you mind if I opened the door?

　 --- ________________.

A. Yes, go ahead　　　 B. No, go ahead　　　 C. Yes, please　　 D. Never mind

16. ---You _______ part in the party in time.

　 ---Sorry I was delayed by the accident.

　A. are supposed to take　　　　　　 B. have supposed to　　　

　C. are supposed to have taken　　　 D. supposed to take

15. This book is said to be a special one which ________ many events not found in other history books.

　A. writes　　　　 B. covers　　　　　 C. prints　　　 D. reads

14. We are ________ by doctors to eat more natural food and take plenty of physical exercises.

A. suggested　　　 B. warned of　　　　 C. informed　　　　 D. advised

13. Not only __________ interested in football but _________ beginning to show an interest in it.

A. the teacher himself is, all his students are

B. the teacher himself is, are all his students

C. is the teacher himself, are all his students

D. is the teacher himself, all his students are

12. Next door to ours _________, who has just returned form abroad.

A. where lives an old man　　　　　 B. where does an old man live　　　

C. lives an old man　　　　　　　 D. does an old man live

11.The boy left home without telling anyone,_______never to return.

　 　 A.to determne　 　　　 B.determining　 　　　　 　　　 C.determined　 　　　　 D.having determined