◎ 题干
—How did your mathematics exam go?
—I thought I           ,but in fact I fell behind in the class.
A.should have been the top 10B.could have been the top 10
C.may have been the top 10D.need have been the top 10
◎ 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“—How did your mathematics exam go?—I thought I ,but in fact I fell behind in the class.A.should have been the top 10B.could have been the top 10C.may have been…”主要考查了你对  【虚拟语气】【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。