He ____have been busy.I'm not sure.A.may B.must C.mustn't D.need
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He ____have been busy.I'm not sure.A.may B.must C.mustn't D.need
He ____have been busy.I'm not sure.
A.may B.must C.mustn't D.need
He ____have been busy.I'm not sure.A.may B.must C.mustn't D.need
因为不确定~
所以应该选择may也许,可能~
选择A
选A
因为后面的意思为:我不确定。
请采纳,谢谢!
He ____have been busy.I'm not sure.A.may B.must C.mustn't D.need
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