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for something, a receipt is given to youA.PayingB.Having paidC.When you have pai

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for something, a receipt is given to youA.PayingB.Having paidC.When you have pai

______ for something, a receipt is given to you

A.Paying

B.Having paid

C.When you have paid

D.To be paying

试题答案

C

考查非谓语动词。pay和give有先后关系,应该用完成时;排除A、D;B项缺少逻辑主语,故排除;C项符合题意。故选C。