◎ 题干
— Mary's score on the test is the highest in her class.
— Really? She ______ have studied very hard.

[     ]

A. may
B. ought to
C. must
D. should
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Mary's score on the test is the highest in her class.— Really? She ______ have studied very hard. [ ] A. may B. ought to C. must D. should …”主要考查了你对  【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。