问题
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 ________ an emergency[ ]
A: why;for fear that
B: for which;in case of
C:how;forfearof
D:that;incase
B: for which;in case of
C:how;forfearof
D:that;incase
正确答案是：
同类题型
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