问题
选择题
______ for something, a receipt is given to you.
A．Paying
B．Having paid
C．When you have paid
D．To be paying
答案
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。
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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
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。