题目内容：

从方框中所给的选项中选出能填入空白处的最佳选项，补全短文。

Boys and girls,

Attention, please! Do you know how to keep safe in our everyday life? Today I’d like to tell you some ways to keep safe.     1.

2.   A park is a safe place because there are no cars or buses in it.

Second, obey the traffic rules, please! Before crossing a road, stop and look both ways—look left and right. You should walk on the right side of the road.     3.

Third, never put your head or hands out of a car, a bus or a train.

4.  

Fourth, don’t talk to strangers or go with them, especially for the children.    5.  That will be dangerous.