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—Don’t press the button,John.

—What if I________?

A.did B.would C.will D.shall

 

A

【解析】考查虚拟语气。句意为:——John,不要按那个按钮。——如果我按了,那会怎么样?if后其实是省略句,表示对现在的虚拟,应用一般过去时,故选A。

 

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