—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.


  1. A.
    didn’t
  2. B.
    doesn’t
  3. C.
    mustn’t
  4. D.
    hasn’t
A
當(dāng)must表示推測(cè)時(shí)，其后反意疑問(wèn)句部分的時(shí)態(tài)取決于實(shí)際時(shí)態(tài)而不是must后的形式; 本題中“失去工作”的動(dòng)作發(fā)生在過(guò)去，因此用did來(lái)反問(wèn)。
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