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单选题公共英语三级

2018-02-07

第(54)题选

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参考答案

G

答案解析

根据句法可知，在连词and前后的两个成分应该是并列的，后面一个是形容词reachable，故前面缺少的应该是一个形容词，综观所有选项，只有G项的efficient“有效率的”，符合句意，故选G。

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