Don't throw things out of the window. It's dangerous. You might hurt someone. Don't cook here. It's dangerous. A small fire can become a big one. Be careful! Look out for cars. Don't go against the traffic. Don't open the door for a stranger. It's dangerous.

    There are many people in the street. Two boys are running. A car is coming from behind. It is very dangerous! A girl is riding a bike and talking on the phone. It is not safe. A young man is waiting for the green light. That is safe.

    Many children are playing in the park. Some are playing football and some are jumping rope. Some boys are swimming in the lake. That is dangerous.