Michael studied hard before the examination in mathematics, and it ______ . He made an A.
A、
paid out
B、
paid off
C、
paid over
D、
paid well
【正确答案】
B
【答案解析】
pay off 没有白费．如：His hard work paid off when he got the promotion pay out“付出(款项等)”；pay over“正式支付”；pay well “收益高”，“报酬高”。根据题意，B是正确答案。
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