35. Unless　　　　 to speak, you should remain silent at the conference no matter what others say,　 in my opinion.

　　　 A. having invited　 B. being invited　　　　 C. inviting　　　　　　 D. invited

34. Without facts, we cannot form a correct opinion, for we need to have actual knowledge　　

　　 our thinking.

　　 A. on which to base　　　　　　　　　　　 B. which to base

　　 C. which to be based on　　　　　　　　　　 D. which to base on

33. Was it 　　　　　she said or something that she did ~ you were angry at so much?

　　 A. that; which　　 B. that; what　　　　 C. what; which　　　　 D. what; that

32. ---------You realize that you were driving at 100 mph, don't you?

　 ----------No, officer, I 　　　　. This car can't do more than 80.

　　 A. may not have been　　　　　　　 　　　　B. couldn't have been

　　 C. needn't have been　　　　　　　　　　　 D. didn't need to be

31.　 That engineer well-known to us all must get tired,　 for he 　　　　the experiment in the lab　 for almost seven and a half hours.

　　 　A. was doing　　　 B. had been doing　　　 C. has been doing　　　 D. has done

30.　　　　 the meeting himself gave them a great deal of encouragement.

　　 A. The president to attend　　　 　　　　　　B. The president will attend

　　 C. The president attended　　　　　　　　　 D. The president's attending

29. It is said 　　　　the fact 　　　　the naughty pupil, who seldom finished his homework, has　 failed in the mid-term examination is not the one　 　　　　she told all of us.

A. what; that; which　　　　　　　　 　B. which; which; which

C. that; that; that　　　　　　　　　　 D. that; which; who

28.　　　　 , I think, and the problems could be settled.

　A. If you double your efforts　　　　　　 B. A bit more efforts

　C. So long as you keep spirits　　　　　 D. Making great efforts