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Mary has got a full mark in the test. She _____very hard all these days.A、will w
Mary has got a full mark in the test. She _____very hard all these days.A、will w
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2023-09-21
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问题
Mary has got a full mark in the test. She _____very hard all these days.
选项
A、will work
B、may work
C、must have worked
D、could have worked
答案
C
解析
本题考查的是情态动诃的用法。must have done表示“一定做过……”,是对过去发生的事情最为肯定的推测,符合句义,故选C。选项A中的will用于一般将来时,表示“将要……”,不合题意。选项B中的may表示“可能,也许”,但表示推测时,语气较轻,不合题意。D选项中的could have done结构也表示推测,但语气比must have done轻,所以也排除选项D。
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