Look!Mr.Li is in the library.It____ be him .He has gone to Tanzhou.
题目
Look!Mr.Li is in the library.It____ be him .He has gone to Tanzhou.
A.mustn't B.can't C.shouldn't D.won't选什么为什么?
答案
答案选B.can't
can't be 不可能是
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