David studied hard before the examination, and it ______. He made an A.
A. worked out   B. marked out   C. paid off D. got through
C
考查短語(yǔ)。據(jù)句意it代指戴維考前努力學(xué)習(xí)，他獲得A，應(yīng)是努力得到回報(bào)，所以選C,pay off意為回報(bào)。
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