翻译：飞机起飞时乘客们应该关掉手机 (用suppose ,switch)
问题描述：
翻译：飞机起飞时乘客们应该关掉手机 (用suppose ,switch)
答
Passengers should suppose to turn off the cellphone when the airplane takes off.
答
Passengers suppose to switch off cellphones before the airplane takeoff.
答
Passengers should suppose to turn off the cellphone when the airplane takes off.
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