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    精英家教网 > 初中英语 > 题目详情

    These young trees must        .


    1. A.
      look after well
    2. B.
      be well looked after
    3. C.
      take good care of
    4. D.
      be taken good care
    B
    解析：
    考查被动语态。被动语态的构成是am/is/are+过去分词。These young trees是物作主语，应该用被动语态；must后应该用动词原形，am/is/are的原形是be，排除A、C；D项的固定短语缺少介词of，排除D。“照顾”look after=" take" care of。故选B。
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