難度：★  考點：情態(tài)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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