单选题：Customers often defer payment for as Long as possible．

题目内容：

Customers often defer payment for as Long as possible． A．make
B．demand
C．postpone
D．obtain

参考答案：

答案解析：

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Which of the following does the writer cite as a source of moral void?A．Official

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In the US．graduated students with no jobs can buy university health insurance．A．

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根据下列文章,请回答题。Sleep Necessary for MemoriesBurning the midnight oil before an exam

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