题目内容

(·黑龙江省哈三中高三上月月考)      35. --- 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 of                      D. that; in case

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