—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
當(dāng)must表示推測時，其后反意疑問句部分的時態(tài)取決于實際時態(tài)而不是must后的形式; 本題中“失去工作”的動作發(fā)生在過去，因此用did來反問。
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