難度：★ 考點：情態動詞辨析
1.That man______be my English teacher.He has gone to Canada.
A.needn't B.mustn't C.can't
2.-Look!A book is on the floor.Whose is it?
-It______be Rick's.It has his name on it.
A.mustn't B.can't C.must D.need
3．一Shall I tell Jim the good news?
一No,you________．I've told him already．
A．wouldn't B．needn't C．shouldn't D．mustn't
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