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    By the end of last year they thousands of orange trees on the mountains. A. had planted B. have planted C. were planting D. would plant 【查看更多】

     

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    By the end of last year they _____ thousands of orange trees on the mountains.     
    [     ]
    A. had planted
    B. have planted
    C. were planting
    D. would plant

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    By the end of last year they ________ thousands of orange trees on the mountains．


    1. A.
      had planted
    2. B.
      have planted
    3. C.
      were planting
    4. D.
      would plant

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    By the end of last year they ________ thousands of orange trees on the mountains．

    [　　]

    A．had planted

    B．have planted

    C．were planting

    D．would plant

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