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  • 科目:英语
  • 题型:单选题
  • 难度:较易
  • 人气:1043

( 上海卷29). -- Sorry, Professor Smith. I didn't finish the assignment yesterday.
-- Oh, you      have done it as yesterday was the deadline.

A.must B.mustn't C.should D.shouldn't
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(上海卷29).Sorry,ProfessorSmith.I