“Why didn’t she come to the meeting yesterday？” “I’m not so sure. She ______ ill.”

    A. should be             B. should have been

    C. must be               D. might have been

________the problem, he wouldn't have committed those mistakes.

A. If he understood    B. Had he understood    C. When he had understood   D. If he would understood

.— I hear you’ve got a set of Australian coins. ______I have a look?

  — Yes, certainly.

   A. Do      B. May      C.Shall      D. Should

 How can you possibly miss the news？ It _______ on TV all day long.

    A. has been        B. had been    C. was             D. will be

I can guess you were in a hurry. You      your sweater inside out .

A．had worn  B．are wearing      C．were having on D．were dressing

I ____ to send him a telegram to congratulate him on his marriage, but I ____ it.

A．hoped,  hadn’t managed      B. has hoped, didn’t manage

   C．hope, don’t manage          D. had hoped, didn’t manage

 — Have you handed in your papers?

—Yes, we have. I guess they ___________ now.

A. have corrected   B. are corrected      C. are being corrected      D. are correcting

 —Tom, it’s time that you _______your own clothes.

—I would rather you _______that for me just like before.

A. washed; had done      B. wash; have done    C. washed; have done     D. wash; had washed

Thomas Alva Edison didn’t “invent” the light bulb (灯泡), but rather he ______ a 50 –year –old idea, which is not well –known.

A. improved upon       B. take down       C. put up        D. break away

The teacher asks the students to talk in English out of class just as they______in class.

A. are    B.were     C.do     D. did