◎ 题干
– I ran 10 miles last weekend. Can you believe that?
– Wow, that ______ easy!
A.mustn' t beB.mustn't have been
C.can't have beenD.couldn’t be
◎ 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“– I ran 10 miles last weekend. Can you believe that? – Wow, that ______ easy!A.mustn' t beB.mustn't have been C.can't have beenD.couldn’t be…”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。