◎ 题干
--- Do you know the reason _________ pilots turn off the plane’s lights before taking off?
---The practice is for the passengers to adjust to the dark _________ an emergency.
A.why; for fear that B.for which; in case of
C.how; for fear ofD.that; in case
◎ 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“--- Do you know the reason _________ pilots turn off the plane’s lights before taking off?---The practice is for the passengers to adjust to the dark _________…”主要考查了你对  【状语从句】【限制性定语从句】【主语从句】【同位语从句】  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。