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  • 1. (2020六上·浦东新期末) 将下列单词的编号填入空格,每空格限填一词,每词只能填一次

    A. exam  B. Twenty  C. climbing  D. protect  E. climb   F. their   C. activity

        Chengdu University is teaching students how to a tree using professional equipment(专业设备). students enrolled(报名) in the course. At the end of the training, tee students bare an . It tests climbing skills. Tree climbing is an outdoor  .  The teachers have taken some steps to the safety of the students and the health of the tree.

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