学进去

Children are often interested in fire. They like to play w1． matches. If they are not c2．, they start fires at home. They hide under beds or just cry with fear instead of running to safety. 20%-25% of all fire deaths are children, so all children should learn about the danger of fire.

Most fires start out s3．, but after a few minutes they can be big. The most important thing to do is to hide all matches. Of course, young children should never be left alone in the home. Even if they don't play with fire, they may start a fire by trying to cook in the wrong way.

It’s also important for children to learn how to crawl (爬) on the floor and below the smoke to g4． out of the house and ask for help from another place. Don’t try to put out the fire yourself. Call 119 and tell where you are and w5． is on fire.

Remember not to go back into the home for your pets or your favourite t6．. Firefighters will do this. Don’t use the lift. Always use the stairs. The lift may go wrong and keep you inside.

What do you, the trees and animals have in common(共同点)? You all 1． water. Water is the “life blood” of our earth. It is in every living thing. Without water, your body would stop 2．. It is in the air. It runs through 3． and valleys. It forms lakes and oceans. Water is everywhere.

Nature has a great water system. Rainwater finds its way to 4． and rivers. Rivers lead to the oceans. At the mouths of the rivers, fresh water joins the salt water of the oceans. Here at the mouth of a river there is much important plant and animal life. However 5． destroys the life, so we have to clean our streams and rivers. Man has to work 6． nature-not against it.

Water is very important to us. Everyday we drink water, cook with water, take a s1． in water, and have many other activities with water. Let’s read and learn more about it!

2． percent of an adult’s body is water. And about 80 percent of a baby’s body is water.

Drinking too much water q3． can cause water intoxication(中毒).

People should have about eight cups of water everyday.

By the time you feel t4．, your body has lost over 1 percent of its total water amount.

If there is no water, we can’t brush our teeth and wash our clothes. If there is no water, the

And now, it’s time for us to s7． water!

A man is walking through a forest. He has a few caps in his h1．. In the forest there are a lot of m2．. The day is hot, so he decides to have a rest under a tree. He puts one cap on his head and l3． down to sleep.

When he wakes up, he can’t find his caps.”Where are my caps?” He cries and looks up. He sees some monkeys in the tree. Each has a cap on i4． head.

“Give me b5． my caps!” shouts the man to the monkeys. But the monkeys don’t u6． him.They o7． jump, laugh and dance.

“How can I go back my caps?” he thinks hard. In the end he has an idea. He takes off his cap and throws it on the g8． .The little animals do the s9． things. Happily the man picks up all the caps and goes on his w10． .

Most of us use alarm clocks to wake up at the right time for work. We look at our w1．to know when to catch a bus or train. However, there is also a right time to eat, sleep, exercise, and take medicine, too. We can't look at a clock for the right time for these activities. We must listen to the clock inside our b2． our biological clock.

Today, doctors are learning more about chronobiology (生物钟学), the study of biological clocks. They are learning about the i3．of time for our bodies. For example, it is best for people to go to sleep at the s4．time every night and to eat only when they're hungry. Also, doctors have discovered that some i5．, such as heart attacks, occur most often in the morning. This information tells them that the b6．time to take heart medicine may be at night. When patients take heart medicine at night, they may prevent a heart a7．in the morning.