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20． ?Another cup of coffee? -No, thanks． I be off． Mary is waiting for me．A． can B． may C． must D． might 【查看更多】

 

題目列表(包括答案和解析)

–Another cup of coffee?

–No, thanks．I _____ be off．Mary is waiting for me．

A． can          B． may           C． must               D． might

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－Another cup of coffee?

－No, thanks．I ________ be off．Mary is waiting for me．

[　　]

A．can

B．may

C．must

D．might

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