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 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。