A teacher walked around a room while teaching stress management (压力管理). She held a glass of water and asked, "How heavy is this glass of water?" Answers shouted from 8 oz (盎司) to 20 oz.

She replied, "The weight (重量) doesn't matter. It depends on how long I hold it. If I hold it for a minute, it's not a problem. If I hold it for an hour, my arm will feel uncomfortable. If I hold it for a day, my arm will hurt. In each case, the weight of the glass doesn't change, but the longer I hold it, the heavier it will become."

She continued, "The stresses and worries in life are the same. Think about them for a while and nothing happens. Think about them a bit longer and they begin to hurt. And if you think about them all day long, you will be unable to do anything."

It's important to remember to let go of your stresses. Put all your worries down as early in the evening as you can. Don't carry them through the evening and into the night.

Every year several thousand people are killed(杀害) on the roads in Great Britain. Every year between one and two hundred thousand people are hurt. These people are killed or hurt in road accidents.

There are rules to make the roads safe, but people do not always obey the rules(遵守规则). They are careless. If everybody obeys the rules, the roads will be much safer. How can we make the roads safer?

Remember this rule. In Great Britain traffic keeps to the left. Cars, buses and bikes must all keep to the left side of the road. In most other countries traffic keeps to the right.

Before crossing the road, stop and look both sides. Look right and left. Then, if you are sure that the road is clear, it is safe to cross the road. If you see small children or old people, help them to cross the road. We must teach small children to cross the road safely. We must always set them a good example. Small children must not play in the street.