【題目】—Guess what！I have got A for my term paper.

—Great！You ________ read widely and put a lot of work into it.

A. must B. should

C. must have D. should have

【答案】C

【解析】本題考查情態(tài)動詞的用法。由“have got A”可知是對過去發(fā)生事情的推測，故用“情態(tài)動詞+have done”結(jié)構(gòu)。must have done表示“必定做過某事”，符合題意。

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