—I was told that Jack had a car accident yesterday.—I believe not. He______.

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问题 —I was told that Jack had a car accident yesterday.—I believe not. He______.

选项 A、shouldn’t have been so careless
B、wouldn’t be so careless
C、couldn’t be so careless
D、mustn’t be so careless

答案C

解析这是一组情态动词的特殊用法，它们的意义分别为：couldn’t have done：表示一种推测：不可能做，含有主观因素；shouldn’t have done：(过去)不应该做；wouldn’t have done：用于虚拟语气中，表示与过去事实相反的结果。mustn’t do：表示现在绝对不能做。

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