行人、骑自行车的人和司机都应该遵守交通指示灯，红灯时停下来，等变成了绿灯再走。
Pedestrians, cyclists and drivers should all obey traffic lights, ________ when the light is red and ________ for it to turn green to go.
行人、骑自行车的人和司机都应该遵守交通指示灯，红灯时停下来，等变成了绿灯再走。
Pedestrians, cyclists and drivers should all obey traffic lights, ________ when the light is red and ________ for it to turn green to go.
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