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All mobile phones must be turned off from when the aircraft doors are closed____
All mobile phones must be turned off from when the aircraft doors are closed____
游客
2025-07-18
5
管理
问题
All mobile phones must be turned off from when the aircraft doors are closed______ the doors open again on arrival.
选项
A、until
B、unless
C、before
D、when
答案
A
解析
句意:机舱门一关闭,所有的手机都要关机,直到飞机抵达后舱门再次打开时。本题考查的是连词词义辨析。本题中,空格处有“直到”的含义,只有until符合题意。故A正确。
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