摘要：I don’t know=

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I don't know ________ book this is.


  1. A.
    who
  2. B.
    whom
  3. C.
    who's
  4. D.
    whose
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I don't know if it ________ tomorrow．If it ________, I'll stay at home．


  1. A.
    will rain; rains
  2. B.
    rains; will rain
  3. C.
    will rain; will rain
  4. D.
    rains; will rain
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I don't know ________．


  1. A.
    to go where
  2. B.
    where will go
  3. C.
    where to go
  4. D.
    go where
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I don’t know ___________ the question.


  1. A.
    what to answer
  2. B.
    how to answer
  3. C.
    to answer what
  4. D.
    to answer how
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I don’t know if Mr Wang ________here tomorrow . If he ______ , please tell me.


  1. A.
    comes , comes
  2. B.
    will come ,comes
  3. C.
    comes , will come
  4. D.
    will come ,will come
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