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Mary was not in her bedroom yesterday afternoon.She___in her classroom.A.should have been B.must have been C.must be D.should be
题目详情
Mary was not in her bedroom yesterday afternoon.She___in her classroom.
A.should have been B.must have been C.must be D.should be
A.should have been B.must have been C.must be D.should be
▼优质解答
答案和解析
B.must have been 一定（对过去事实肯定的推测）
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