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34、Unless      to speak, you should remain silent at the conference.

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

33、Only after I had known him for some time      to appreciate his real worth.

       A. do I begin                                         B. did I begin

       C. I began                                             D. had I begun

32、    surprised me most      to see some of the village people seated on the benches at the end of the room.

       A. What; was                                   B. What; were

       C. That; was                                    D. That; were

31、The teacher demanded that the exam      before eleven.

     A. would be finished                            B. must be finished

     C. be finished                                      D. must be finishing

30、 John dashed back into the room, and saw     .

     A. what wrong was                                   B. what was wrong

     C. if wrong was                                        D. if was wrong

29、______ in a friendly way, their quarrel came to an end.

   A. Being settled    B. Settled         C. Having settled       D. Settling

28、The telephone ______ four times in the last hour, and each time it ______ for my roommate.

      A. has rung; was                        B. has been ringing; is 

C. had rung; was                        D. rang; has been

27、She must be looking forward as much to his return as he himself is to ______ her.

   A. see             B. have seen       C. seeing               D. having seen

26、He often writes to us expressing his hope ______ he’ll come to see us when he returns to China.

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