1. (2020六上·新乡期中) 根据短文内容，判断正误。

If we go on foot, by car or by bike, we must know the traffic rules. We must look at the traffic lights. There are always three lights: red, yellow and green. When the red light is on we must stop. When the yellow light is on, we must wait, when the green light is on. We may go now!

1. （1） We must know the traffic rules.
3. （2） There are always four lights.
5. （3） Go at a yellow light.
7. （4） When the green light is on, we may go.
9. （5） We must pay attention to the traffic lights.