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——I'm not sure if she will go with us.——If she___,we'll have

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——I'm not sure if she will go with us.——If she___,we'll have to wait fo
A.is B.does C.will D.did
——I'm not sure if she will go with us.——If she___,we'll have
答案:【B.does 】
保证正确,主将从先
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再问: why?
再答: if引导的从句,主将从先,主句we'll have to wait for用将来时态,从句 If she..用现在时态