题目内容
Tom passed the exam . He didn’t study well for it. The exam ______ difficult.
A. must have been B. mustn’t have been C. can’t have been D. must be
C
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题目内容
Tom passed the exam . He didn’t study well for it. The exam ______ difficult.
A. must have been B. mustn’t have been C. can’t have been D. must be
C