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Lucy is reading a book ________ medicine.


  1. A.
    on
  2. B.
    about
  3. C.
    ×
  4. D.
    at
A
on侧重于科学方面的知识,而about侧重于一般性的知识内容.医学是一门比较深奥的科学,所以介词用on,即答案为A.
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【小题2】A. drink        B. drinking       C. drinks
【小题3】A. and          B. with            C. after
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【小题2】A. drink        B. drinking       C. drinks
【小题3】A. and          B. with            C. after
【小题4】A. sit          B. sits            C. sitting
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3.A. and          B. with            C. after

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