The teacher said to the students,“You ________ your homework yesterday but none of you did so.”


  1. A.
    should finish
  2. B.
    must finish
  3. C.
    ought to do
  4. D.
    should have done
D
should have done表示“本該做而沒有做的事情”，而shouldn't have done表示“本來不該做而做了的事情�！�
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科目：高中英語 來源： 題型：

.The teache rfound ____ difficult to decide____ he would take with him to attend the

conference.

  A.it;whom        B.himself;who       C.this;whom      D.that;who

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