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    精英家教网 > 高中英语 > 题目详情

    They've kept up a friendship with the teacher whom they were at school _____ twenty years ago.


    1. A.
      with
    2. B.
      about
    3. C.
      since
    4. D.
      till
    A
    易错选B或C, whom在这里指代the teacher,因此定语从句可还原为： They were at school／with the teacher twenty years ago.
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