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    18．Every time our math teacher began his lesson，my mind would begin to _________，which showed my lack of interest in math．（　　）
    A．increaseB．debateC．respondD．wander

    分析 每次我们的数学老师开始上课时，我的思想就开始开小差，这显示了我在数学方面缺乏兴趣．

    解答 答案D．
    A项"增加"；B项"辩论，争论，讨论"；C项"回答；作出反应"；D项"游荡，漫游；徘徊"，动词短语"sth wander      走神，（神志）恍惚"；动词短语"每次我们的数学老师开始上课时，我的思想就开始开小差，这显示了我在数学方面缺乏兴趣"可知，D项符合语境，故选D．

    点评 本题考查动词辨析．解答此类题目首先要读懂句意，理解每个选项动词的意思，然后根据上下文语境锁定合适的动词．平时要加强动词词汇量的积累．

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