21．--Look, Mr. King is swimming in the pool．--It be Mr. King．He has gone to Kunming on vacation．A．can B．can’t C．must D．mustn’t 【查看更多】

 

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--Look, Mr. King is swimming in the pool．

--It       be Mr. King．He has gone to Kunming on vacation．

A．can                      B．can’t                   C．must                      D．mustn’t

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－Look, Mr．King is swimming in the pool．

－It ________ be Mr．King．He has gone to Kunming on vacation．

[　　]

A．can

B．can't

C．must

D．mustn't

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