题目内容

—Jane, have you finished yourpaper?     
—No, I      my sister with her homework all the morning


  1. A.
    help
  2. B.
    have been helping
  3. C.
    helped
  4. D.
    was helping
B
考查时态。根据句意及时间状语all the morning可知,我一直在帮助,故用现在完成进行时,选B。
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