[单选题]Mary’s score on the test is the highest in her class; she ______ have studied very hard.
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2023-10-01 08:01:29
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[单选题]Mary’s score on the test is the highest in her class; she ______ have studied very hard.

A.may
B.must
C.should
D.ought to
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国家开放大学

形成性考核

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