Look!Mr.Li is in the library.It____ be him .He has gone to Tanzhou.
问题描述:
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
答案选B.can't
can't be 不可能是