◎ 题干
Tom _____ the light and began to do his homework.    

A. turned on
B. turned off
C. turned up
D. turned down
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Tom_____ the light and began to do his homework. []A. turned onB. turned offC. turned upD. turned down…”主要考查了你对  【实义动词的过去式】【动词短语】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。