5.　　　 When can you cross the roads?

The _______are _______.

15

Three things are necessaries(必要的) for us to keep alive(活着). What are they? They are air, water and food. We eat food twice or three times a day. We drink water several times a day. We breathe(呼吸) day and night. If a man does not eat any food and does not drink anything, he can live for about three days. But if he does not breathe, he can keep alive for only about three minutes. So we see that breathing is even important than drinking, and drinking more important than eating.

We can’t live ⑹_______there is no air or water or food. For us, food is very important, water is ⑺_______important, and air is the most important. Why? Because we can ⑻_______live for about three minutes without air. Three minutes--⑼_______a short time it is! Food and water are less important than air, ⑽_______we can’t be short of them, either.

16

Mary has four cousins(表兄妹). They are Betty, Peter, Bill and Aun. Mary is the oldest of the five. Betty is thirteen years old. She is two years younger than Mary and one year older than Peter. Bill is nine, and Aun, the youngest, is seven.

Betty and Peter are good runners. But Peter runs faster. Mary and Aun like to play basketball. Mary plays better than Aun. Bill is the best singer of the five. Mary and Betty study in a middle school. Peter, Bill and Aun study in a primary school(小学). The five children all work hard at school. But Betty works hardest.

4.　　　 What should one do before crossing the roads?

　　 To look _______ _______.

3.　　　 Children are often not careless while crossing the roads, are they?

　　 _______, they _______.

2.　　　 Do people think a car can stop in a few meters?

　　 _______, they _______.

1.　　　 Why are old people often killed while they are crossing the roads?

　　 _______they can’t see _______hear very well.

10.　　 A. and　　　　　　　 B. so　　　　　　　 C. but　　　　　　　 D. /

14

Every day some people are killed while they are crossing the roads. Most of these people are old and children. Old people are often killed because they can’t see or hear very sell. Children are killed because they are not careful. They forget to look and listen before they cross the roads.

A car or a bus can’t stop quickly. If a car is going very fast, it will travel many meters before it stops. Some people don’t always understand this. They think a car can stop in a few meters. It is difficult to know how fast a car is moving. The only way to cross the roads safely is to look both ways, right and left. Then if the roads are empty, you can cross them.

9.　　　 A. answered　　　　 B. said　　　　　　　 C. told　　　　　　　 D. spoke

8.　　　 A. look　　　　　　 B. look at　　　　　　 C. see　　　　　　　 D. find

7.　　　 A. looking　　　　　 B. to look　　　　　　 C. for looking　　　　 D. for look

6.　　　 A. look at　　　　　 B. look for　　　　　 C. look like　　　　　 D. look after