6.--Look! Jack is crossing the street.--It be him.He's in Beijing and he won't he back until Friday.A.may B.can C.can't D.mustn't 查看更多

 

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--Look! Jack is crossing the street.

--It ________ be him.He's in Beijing and he won't he back until Friday.

A.may       B.can        C.can't        D.mustn't

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