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    精英家教网 > 高中英语 > 题目详情
    The environment will be further polluted unless some measures _____.
    A．are takenB．will be taken
    C．are being takenD．should be taken
    A

    试题分析：考查时态：句意：环境将被进一步污染，除非一些措施被采取。主句是一般将来时，Unless引导的是条件状语从句，用一般现在时代替将来时。选A。
    点评：时态题的考查关键是抓住句子的上下文含义和句中的时间状语。要根据时间状语来选择合适的时态，在平时的学习中要注意积累有关时态的用法和各种时态的特殊之处。注意时间条件状语从句不能用一般将来时，应该用一般现在时代替一般将来时。
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