________ can cause air pollution, so we’re encouraged to go on bikes or foot.

1. A.
   Keeping lights on when sleeping
2. B.
   Riding in cars
3. C.
   Using paper towels or napkins
4. D.
   Recycling paper

Man began to make use of fire long long ago. Fire is useful in many ways, but sometimes it is dangerous. If you are not (1)        with it, it can burn things or (2)       hurt you. A big fire can (3)        forests and tall buildings. Sometimes a piece of (4)        paper can cause a big fire. So please remember (5) ______      in the dry places like woods and forests (6)        throw a cigarette end on the grass and it’s also important for you to put the candles in the 7)       place. When you use candles at home ,you should (8)        your long hair away from the fire.

But if there is a (9)        in our building, what should we do with it? Pour some water (10)       your clothes. What’s more, put a (11)        towel (毛巾) over your mouth and your nose to keep the (12)______                out. You’d better run away from the fire as (13)        as you can. But you mustn’t rush! Or you may fall over and hurt yourself or others. Of course you should also call 119. On the phone you should clearly tell the firemen (14)      the fire is to help them get there without difficulty. By the way, Do not (15)        out of the window. Jumping may be more dangerous than the fire.

Keep ourselves away from fire and safety is above all!

1.                A．careful         B．happy          C．pleased   D．strict

2.A. even          B still            C. also              D. always

3.                A．wash           B．blow           C．burn D．hit

4.                A．black          B．white          C．thick D．thin

5.                A．not to swim      B．not to smoke     C．don’t swim   D．don’t smoke

6.                A．and            B．or             C．and not   D．or not

7.                A．quiet          B．noisy           C．wrong    D．right

8.                A．make          B．put            C．keep D．take

9.                A．forest          B．piece of paper   C．fire  D．an area of grassland

10.               A．above          B．below          C．over  D．under

11.               A．dry            B．big            C．small D．wet

12.               A．air            B．smoke         C．water D．fire

13.               A．slowly          B．quickly         C．happily    D．early

14.               A．where         B．when          C．what  D．how

15.               A．run            B．rush           C．get   D．jump

       can cause high blood pressure and hearing problems.

Carbon monoxide poisoning (一氧化碳中毒) causes death and injuries around the world. This gas is a problem in all parts of the world that experience cold weather. A few years ago, America’s Centers for Disease Control (C. D. C.) studied deaths linked (联系) with carbon monoxide poisoning. It found that the number of carbon monoxide deaths in the United States was greatest in January. The C.D.C. also found that carbon monoxide kills more than four hundred Americans each year. And, it said more than twenty thousand people are taken to hospital for treatment of health problems linked with the gas.

   Carbon monoxide is called the silent killer because people do not know it is in the air. The gas has no color, no taste and no smell. It does not cause burning eyes. And it does not cause people to cough. Yet, carbon monoxide gas is very deadly (致命的). It steals the body’s ability to use oxygen.

Carbon monoxide makes it difficult for the blood to carry oxygen to body tissues (血管). It does this by linking with the blood. When the gas links with the blood, the blood is no longer able to carry oxygen to the tissues that need it. Damage (损害) to the body can begin very quickly from large amounts (数量) of carbon monoxide.

How quickly this can happen depend on how long a person is breathing the gas and how much gas he or she breathes in.

   Carbon monoxide poisoning has warning signs(标志). But people have to be awake to realize them. Small amounts of the gas will cause a person’s head to hurt. He or she may begin to feel tired. Their stomachs may feel sick. The room may appear to be turning around. The person may have trouble thinking clearly.

People develop serious headache as the amount of the gas continues to enter their blood. They will begin to feel very tired and sleepy. They may have terrible stomachache.

Doctors say carbon monoxide influences people differently. For example a small child will experience health problems or die much sooner than an adult. The general health of the person or his or her age can also be important.

1.The damage of carbon monoxide to the body has something to do with _____.

A. the amount a person breathes in         

B. whether a person is healthy

C. how many signs a person finds           

D. ages of people

2.One of the signs of carbon monoxide poisoning is _____.

A. burning eyes                         B. bad cough

C. serious headache                     D. high fever

3.Which of the following is TRUE according to the passage?

A. Carbon monoxide poisoning seldom happens in cold areas.

B. Twenty thousand Americans are killed by carbon monoxide each year.

C. Most people know whether there is carbon monoxide in the air.

D. Carbon monoxide stops the blood from carrying oxygen to body tissues.

4.What does the passage mainly talk about?

A. Warning signs that carbon monoxide poisoning has.

B. Reasons why carbon monoxide can cause person’s death.

C. The damage of carbon monoxide and how it works.

D. Influences of carbon monoxide on children and adults.

完形填空 (30分)

阅读下面短文，从短文后所给的四个选项中，选出可以填入空白处的最佳选项。

A

In today’s world, pollution has become a serious problem.  51.  we know, air pollution is harmful to our health. However, not all people know that noise    52  also a kind of pollution and is harmful to human health.

People who work and live in noisy conditions may become   53  . For example,  many of the workers who   54. newspapers and books become deaf. Quite a few people living near   55 also have hearing lose. Recently it was reported that many teenagers in America  56 hear better than the old do, because these young people always listen to  57 pop music.  Making a loud noise in public is also a kind of pollution, it not only  58  others but also does great harm to hearing. Cars and machines also produce 59 noise. It makes people feel uncomfortable and unpleasant.  60  , it can cause them to be sick or deaf.Nowadays many countries are trying to solve all sorts of environmental problems, including noise pollution.