試題詳解

721 If the car is stuck on the railroad crossing due to breakdown or traffic jam, the driver or any passersby should quickly press the emergency button and try to push the car away from the railroad crossing. If the car cannot be pushed away and the emergency button is announcing, ʺthe train is coming, please leave the railroad crossing as soon as possibleʺ, leave the railroad crossing as soon as possible.
(A)O
(B)X