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    精英家教网 > 高中英语 > 题目详情
    17．Make sure you have checked the information in the passage       you make the choice．（　　）
    A．afterB．sinceC．whileD．before

    分析 在你做选择之前，要确保你已经核对了这一页上的信息．

    解答 答案：D．根据Make sure you have checked the information in the passage可知核对了这一页上的信息要发生在you make the choice（做选择）之前，所以答案是D before"在…之前"．其他选项的含义分别是A"在…之后"；B"自从"；C"当…时候，然而"．

    点评 考查从属连词．before的固定句型：
    1．用于句型"it was not long+时间段+before …"意为"不久就…．"
    It was not long before he sensed the danger of the position．
    2．用于句型"it will be（not ）+时间段+before…．"表示"要过多久/不久…才…"
    It will be half a year before you graduate from this school．
    It will be not long before you find you are wrong．

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