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(xué)老師開(kāi)始上課時(shí)，我的思想就開(kāi)始開(kāi)小差，這顯示了我在數(shù)學(xué)方面缺乏興趣．

解答 答案D．
A項(xiàng)"增加"；B項(xiàng)"辯論，爭(zhēng)論，討論"；C項(xiàng)"回答；作出反應(yīng)"；D項(xiàng)"游蕩，漫游；徘徊"，動(dòng)詞短語(yǔ)"sth wander      走神，（神志）恍惚"；動(dòng)詞短語(yǔ)"每次我們的數(shù)學(xué)老師開(kāi)始上課時(shí)，我的思想就開(kāi)始開(kāi)小差，這顯示了我在數(shù)學(xué)方面缺乏興趣"可知，D項(xiàng)符合語(yǔ)境，故選D．

點(diǎn)評(píng) 本題考查動(dòng)詞辨析．解答此類題目首先要讀懂句意，理解每個(gè)選項(xiàng)動(dòng)詞的意思，然后根據(jù)上下文語(yǔ)境鎖定合適的動(dòng)詞．平時(shí)要加強(qiáng)動(dòng)詞詞匯量的積累．

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