题目内容

—Daniel must have lost his job in that unemployment crisis,      he?
—I don’t think so. Yesterday I saw him working together with his colleagues.
A．didn’tB．doesn’tC．mustn’tD．hasn’t
A
当must表示推测时，其后反意疑问句部分的时态取决于实际时态而不是must后的形式; 本题中“失去工作”的动作发生在过去，因此用did来反问。
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