1、——Listen!Is Lingling crying in the classroom?——Oh,it ____ be Lingling.She has gone home.A.mustn't B.can't C.hasn't

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1、——Listen!Is Lingling crying in the classroom?——Oh,it ____ be Lingling.She has gone home.A.mustn't B.can't C.hasn't
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1、——Listen!Is Lingling crying in the classroom?——Oh,it ____ be Lingling.She has gone home.A.mustn't B.can't C.hasn't
1、——Listen!Is Lingling crying in the classroom?
——Oh,it ____ be Lingling.She has gone home.
A.mustn't B.can't C.hasn't

1、——Listen!Is Lingling crying in the classroom?——Oh,it ____ be Lingling.She has gone home.A.mustn't B.can't C.hasn't
填B,can't be,不可能是,而must be虽有“一定”的意思,但否定形式mustn't be就是“不一定是”的意思了,表示猜测.而后句有She has gone home. 表示肯定他回家了,不是猜测,故选B