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职称英语
Mary’s score on the test is the highest in her class; she______have studied very
Mary’s score on the test is the highest in her class; she______have studied very
游客
2023-11-08
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问题
Mary’s score on the test is the highest in her class; she______have studied very hard.
选项
A、may
B、should
C、must
D、ought to
答案
C
解析
情态动词。must have done表示对过去的肯定推测，根据句义可知前后半句为肯定的因果逻辑关系，而且后面的行为发生在前面的行为之前，故选择C。
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