每空限填一词，每词限用一次。
accident before safe never excite they enter right both good
Every year thousands of children are hurt or die in the traffic accident. So it’s necessary to teach them some knowledge about traffic _______. When the signal is red, it means stop. When the signal is yellow, it means look and when it's green it means go.Let _______ really know the traffic signals and signs.
Look both sides ______ you cross the road. Make sure that you look ______ sides and see no cars are coming near you. It's ______ to always walk on a sidewalk. If there is no sidewalk, you must walk on the ______ so that you see the cars coming towards you.
I know how ______ and fun it is to put your hand or head out of a moving car. But this can cause ______ and can hurt your bodies. So you mustn't do it. Also make sure you ______ the bus and get off the bus when it stops completely. You should ______ play in a moving bus as it can hurt you. These rules can keep you safe. You must remember them.