根据所学常识判断下列说法是对(√)还是错(×)。( ) 1. There are always three traffic lights: red, yellow and green.
( ) 2. It's not fast to go by plane.
( ) 3. If you go on foot, you don't need (需要) to know the traffic rules.
( ) 4. In the US, drivers drive on the right side of the road.
( ) 5. If the light is yellow, you can go.1. √ 2. × 3. × 4. √ 5. ×