◎ 题干
— Mary,how did your maths test go?
—I had thought I _____ ,but in fact I came in the top 10 in my class. 
A.should have failed
B.couldn’t have failed
C.might have failed
D.shouldn’t have failed
◎ 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,how did your maths test go?—I had thought I _____ ,but in fact I came in the top 10 in my class. A.should have failedB.couldn’t have failedC.might h…”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。