For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.

Indoor air pollution can cause a person to feel tired, to suffer eye pain, headache and other problems. Some pollutants(污染物)can cause breathing disorders, diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution.

People have paid more attention to the problem now. It is true that when builders began making houses and offices they did not waste energy. To do this they build buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.

As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building—green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb(吸收)or take in the pollutants. In exchange the plant lets out oxygen through its leaves and tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square meters of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and healthier place.

1.Generally speaking, indoor air pollution may be more harmful than the air outside because .

A.indoor air pollution can often make people seriously ill

B.man-made building materials give off dangerous gases

C.there may be more harmful gases outside the buildings

D.the air indoors is polluted, which is very harmful

2.Some kind of indoor pollution can be found in .

A.every modern house B.every old house

C.all kinds of houses D.all kinds of offices

3.The indoor air pollution is caused by .

A.the limit of the flow of air between inside and outside

B.the building way that the builders want to save energy

C.the building things that are made of man-made materials

D.the man-made building materials and the limit of air-flow

4.The reason why we should use different kinds of plants to clean the air is that

A.plants can let out all kinds of pollutants indoors

B.plants may take in more oxygen (氧气)which people need

C.plants can absorb all kinds of harmful indoor chemicals

D.plants can make our houses prettier and more healthy

Have you ever suddenly felt that someone you know was in trouble——and he was? Have you ever dreamed something that came true later? Maybe you have ESP(超感官知觉).

ESP stands for Extra Sensory Perception. It may be called a sixth sense. It seems to let people know about events(事件)before they happen, or events that are happening some distance(距离)away.

Here is an example: A woman was doing washing. Suddenly she shouted, “My father is dead! I saw him sitting in the chair!” Just then, a telephone came. The woman’s father had died of a heart illness. He died sitting in a chair.

There are thousands of stories like this on record. Scientists are studying them to find out what is behind these strange mental(心理的)messages. Here’s another example——one of hundreds of dreams that have come true.

A man dreamed he was walking along a road when a horse and carriage came by. The driver said, “There’s room for one more.” The man felt the driver was Death, so he ran away. The next day the man was getting on a crowded bus. The bus driver said, “There’s room for one more”. Then the man saw the driver’s face was the same face he had seen in the dream. He wouldn’t get on the bus. As the bus drove off, it crashed and burst into fires. Everyone was killed!

Some people say stories like these are lies or coincidences. Others say that are ESP in true, From studies of ESP, we may some day learn more about the human mind.

1.ESP lets people know about _________.

A. their dreams

B. events after they happen

C. events before they happen

D. heart illness

2.In his passage the word “coincidences” means ________.

A. things which do not happen

B. things which happen by accident

C. things which are only dreams

D. things dreamed of only by sick people

3.The best title of this passage is _________.

A. Sixth Sense B. The Human Mind

C. A Big Lie D. A Terrible Dream

Recently some American scientists have given a useful piece of advice to people in industrialized nations.They say people should eat more of the same kind of food eaten by humans living more than 10,000 years ago. 1.

The scientists say that the human life has changed greatly.Our bodies have not been able to deal with these changes in lifestyle and this had led to new kinds of sicknesses. 2. So they are called "diseases of civilization".Many cancers and diseases of the blood system are examples of such diseases.

Scientists noted that people in both the Old Stone Age and the New Stone Age enjoyed very little alcohol or tobacco, probably none.3. However, a change in food is one of the main differences between life in ancient times and that of today.

Stone Age people hunted wild animals for their meat, which had much less fat than domestic ones.They ate a lot of fresh wild vegetables and fruits.They did not have milk or any other dairy products, and they made very little use of grains. 4..We eat six times more salt than our ancestors.We eat more sugar.We eat twice as much fat but only one third as much protein and much less vitamin C.

5. But scientists say that we would be much healthier if we eat much the same way the ancient people did, cutting the amount of fatty, salty and sweet food.

A.Stone Age people lived a simple life.

B.But today, we enjoy having a lot of these.

C.In that case, they would live much healthier.

D.Ancient people also got lots of physical exercise.

E.These new sicknesses were not known in ancient times.

F.People today probably don't want to live like our ancestors.

G.Modern people used to suffer from "diseases of civilization".

阅读下面短文,从短文后所给各题的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

A wise teacher let her class play a game. The teacher told each child to bring a bag containing a few ______. Each potato will be given a name of a person that the child _____hates, so the number of potatoes that a child will put into his / her ______ will depend on the ______ of people the child hates.

Some children had two potatoes; some had three and others had_____ up to five potatoes. The teacher then told the children to carry the bag ____ they go for a week.

___ the days went by, the children started to _____ ,because the rotten(腐烂的) potatoes ____ an unpleasant smell. And the students with five potatoes also had to carry _________ bags.

______ a week, the teacher asked, "How did you______?" The children started complaining about the trouble they had to ______, when they had to carry the heavy and _______ potatoes everywhere they went.

Then the teacher said, "This is the _______ when you carry your hate for somebody inside your______. The smell of hate will _______ your heart and you will carry it with you wherever you go. If you cannot ______ the smell of rotten potatoes for just one week, can you _______ what it is like to have the smell of hate in your heart for a ______?"

1.A. games B. books C. potatoes D. persons

2.A. chooses B. loves C. hates D. forgives

3.A. bag B. box C. basket D. barrel

4.A. kind B. number C. weight D. size

5.A. ever B. even C. already D. hardly

6.A. whatever B. whenever C. however D. wherever

7.A. As B. Although C. When D. After

8.A. argue B. disagree C. stop D. complain

9.A. gave in B. gave up C. gave off D. gave away

10.A. larger B. heavier C. more D. fewer

11.A. Until B. Before C. After D. Toward

12.A. play B. learn C. feel D. realize

13.A. go up B. go through C. go on D. go with

14.A. fresh B. delicious C. lovely D. smelly

15.A. situation B. chance C. example D. way

16.A. study B. work C. life D. heart

17.A. pollute B. damage C. kill D. take

18.A. continue B. last C. bear D. love

19.A. remember B. imagine C. recognize D. notice

20.A. week B. moment C. while D. lifetime

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