No air means death．Although we cannot see it, there is air around us．So air is everything, and it gives life to every living thing．Bad air makes people ill．We must have fresh air to keep us healthy．

In the city there are a great many people and there are too many cars running on the roads．The gas which the cars spread (扩散) out is full of poison(毒物)．Every day we breathe it in again and again．This makes us feel sick．Besides so many cars, there are many factories too．From the chimneys of these factories, we get the smoke usually in black and grey color．This kind of the smoke, when it mixes the air, is dangerous to our health, it is because smoke contains (包含) many poisonous solid and gases．So in order to keep us healthy we have to go out to the countryside to breathe more fresh air．Or we can go up hills to get more fresh air．

1．Which of the following best explains that no air means death?

A．Bad air makes people sick．                B．Air can't be seen anywhere around us．

C．Air gives life to every living thing．           D．Fresh air keeps people healthy．

2．Where do people usually breathe fresh air?

A．In big cities．                           B．On the roads．

C．In the countryside．                     D．Around factories．

3．Smoke from the chimneys is dangerous to our health

A．when it makes air dirty                   B．if it contains poisonous solids and gases

C．no matter how it spreads out             D．because it is in black and grey color

4．According to the passage, we know that                        ．

A．we shouldn't go out of doors as much as possible

B．smoke from chimneys is more serious than gas from the cars

C．a great many people have to breathe air in again and again

D．going up hills is one of the best ways to keep healthy

5．The best title for the passage is            ．

      A．The Use of Air        B．Breathing Air           C．Fresh Air                D．Bad Air

阅读理解：

阅读下面短文，根据短文内容，从第1～4小题所给的(A)、(B)、(C)、(D)四个选项中，选择最佳选项。

　　The police do many things for us. They help keep our things and us safe. They help keep cars moving safely. They take care of people who are hurt. Then they see these people get to a doctor.

　　The police go around town to see that everything is all right. They get around town in many ways. Some of them walk or go by car. In some big cities, some of the police ride on horses. It is strange to see these animals in the street.

　　As they go around town, the police help people. Sometimes they find lost children. They take the children home. If the police see a fight, they put an end to it right away. Sometimes people will ask the police how to get to a place in town. The police can always tell the people which way to go. They know all the streets and roads well.

　　Some police stand at crossings. They tell the cars when to go and when to stop. They make sure that the cars do not go too fast. They help children cross the street. They also help people who can't walk too well.

　　Without the police, our streets would not be safe. Cars might go too fast and hurt people. Lost people might never be found. The police do a good job. We need them. And we should thank them for a job well done.

1．The police do many things for us. They help keep our things and us ________.

[　　]

2．How do some of the police get around in some big cities?

[　　]

3．In the text, “put an end to” means “________”.

[　　]

4．The text is mainly talking about the ________ of the police.

[　　]

Every year several thousand people die in the car accidents in Great Britain.   And between one and two hundred thousand people are hurt.
There are rules（规则） to make the roads safe, but people do not always obey (遵守) the rules. They are careless. If everybody obeys the rules, the road 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 ways. 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 very old people, help them to cross the road. We must teach our children to cross the road safely. We must always give them a good example. Small children must not play in the street.
【小题1】If we want to make the roads safer, _______.

A．everybody must be careful and obey the traffic rules

B．traffic should keep to the right

C．don’t cross the road too often

D．roads must be clear

【小题2】 If you ride a bike in Great Britain, you must ride_______ .

A．on the right side of the road	B．on the left side of the road
C．in the middle of the road	D．behind the buses

【小题3】Which is NOT right?

A．Few people die in the traffic accidents in Great Britain.

B．In our country traffic keeps to the right.

C．Every year several thousand people die in the car accidents in Great Britain.

D．Streets are not safe places for playing.

【小题4】 “The road is clear” means that _______.

A．there is no car or bus running

B．the road is very clean

C．the road is not noisy

D．you can see very clearly on the road

【小题5】The safe way to cross the road is to_______.

A．look right	B．look left
C．look both ways, right and left	D．run cross the road