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 每次我們的數(shù)學老師開始上課時，我的思想就開始開小差，這顯示了我在數(shù)學方面缺乏興趣．

解答 答案D．
A項"增加"；B項"辯論，爭論，討論"；C項"回答；作出反應"；D項"游蕩，漫游；徘徊"，動詞短語"sth wander      走神，（神志）恍惚"；動詞短語"每次我們的數(shù)學老師開始上課時，我的思想就開始開小差，這顯示了我在數(shù)學方面缺乏興趣"可知，D項符合語境，故選D．

點評 本題考查動詞辨析．解答此類題目首先要讀懂句意，理解每個選項動詞的意思，然后根據(jù)上下文語境鎖定合適的動詞．平時要加強動詞詞匯量的積累．

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