Tom walked into a shop . It had a sign outside : "Second-hand (旧的) clothes bought and sold . "He was carrying an old pair of trousers and asked the owner of the shop, "How much will you give me for these?" The man looked at them and then said: "Two dollars."

　　"What !" said Tom. "I had guessed they were worth at least five dollars."

　　"No," said the man, "they aren't worth a cent more than two dollars."

　　"Well," said Tom, taking two dollars out of his pocket. "Here's your money. These trousers were hanging outside your shop. The list price (标价)of them was six dollars and a half. But I thought that was too much money, so I wanted to find out how much they were really worth."

　　Then he walked out of the shop with the pair of trousers and disappeared before the shop owner could think of anything to say .

1.At first the owner of the shop thought that Tom __________.

A. wanted to steal the trousers　 　　  B. wanted to sell the trousers

C. wanted to fool him　　　　　　   D. wanted to buy the trousers 

2.The owner of the shop_______ 　for the old trousers.

A. would give Tom two dollars　  

B. would pay three dollars

C. would pay five dollars　　　  　　 

D. would give Tom six dollars and a half 

3.The shop owner insisted（坚持） that the trousers were worth only two dollars because ____.

A. he wanted to sell them cheaply   　 

B. he wanted to buy them cheaply

C. he didn't like the trousers    　　 

D. they were old and dirty 

4.In fact, the trousers _________.

A. were hanging inside the shop　  　　 

B. were stolen by Tom from the shop

C. had been the shop owner's　　 　　 

D. had been Tom's 

5.From the story we know that _________ cheaper than the list price.

A. the owner sold the trousers two dollars

B. Tom sold the trousers one dollar and a half

C. the owner bought the trousers three dollars

D. Tom bought the trousers four dollars and a half

Have you ever been ill? When you are ill，you must be unhappy because your body becomes hot，and there are pains all over your body. You don't want to work，you stay in bed，feeling very sad.

　　What makes us ill? It is germs(细菌). Germs are everywhere. They are very small and you can't find them with your eyes，but you can see them with a microscope. They are very small and there could be hundreds of them on a very small thing.

　　Germs are always found in dirty water. When we look at dirty water under the microscope，we shall see them in it. So your father and mother will not let you drink dirty water. 

　　Germs aren't found only in water. They are found in air and dust. If you cut your finger，if some of the dust from the floor goes into the cut(割开处)，some of the germs would go into your finger. Your finger would become big and red，and you will have much pain in it. Sometimes the germs would go into all of your body，and you would have pain everywhere.

1.Which of the following is TRUE?

A. If things are very small，they are germs. 

B. If things can't be seen，they must be germs.

C. Germs are only in dirty water.     

D. Germs are everywhere around us. 

2.What is a microscope used for?

A. Making very small things look much bigger.

B. Making very big things look much smaller.

C. Helping you read some newspapers.

D. Helping you if you can't see things clearly. 

3.Why don't your parents let you drink dirty water?

A. You haven't looked at it carefully.　   B. Water can't be drunk in this way.

C. There must be lots of germs in it.　   　　D. Water will make you ill. 

4.Which of the following is NOT true?

A. Germs can be found both in water and in the air.

B. Germs can go into your finger if it is cut.

C. If your temperature is not OK，there must be germs in your body.

D. If your finger isn't cut，there aren't any germs on it. 

5.What's the main idea of the passage?

A. Germs may make us ill.　　　　    B. Germs are in dirty water.

C. Don't drink dirty water.　　　　     D. Take care of your fingers.

Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for friction. Friction happens when two things that aren’t very smooth rub together to make heat energy. The faster you rub two things together, the more friction ( and heat) you can make. Let’s discover friction!

WHAT YOU’LL NEED

·Soap ·Water·Your hands!

WHAT TO DO

Make sure your hands are dirty.

Rub your hands together until you feel the heat of your hands.

Now, use soap and water to get your hands very slippery(滑的).

Try to make friction happen while your hands are slippery.

Please write down what has happened.

LET’S TALK!

Friction is an energy that happens when two things rub together. When friction happens, it makes heat! When your hands are slippery, they won’t make very much friction and your hands won’t get so hot.

DID YOU KNOW?

Friction happens when you stop your fast running bike.

Ancient people made fire by rubbing two pieces of wood together. Friction happened though they didn’t know it.

____?___

Friction is everywhere. Have you ever noticed situations where friction is happening? If not, ask your parents to take you out in a car. If it is not hot, touch the tires(轮胎) of the car before and after a short drive to see how much warmer they get from friction.

1. This text is most probably________________________.

A. a science report????????????? ????????????? ????????????? 　 B. a car advertisement

C. a rubbing introduction?????? D. a chemistry programme

2.What does the word “friction” in this text mean in Chinese????????

A.摩擦????????????? ????????????? B. 冷却??????? C. 膨胀????????????? ????????????? ????? D.震动

3.___________ is not an example of friction.

A. Bike riding????????????? B. Car driving??? C. Hands rubbing????????????? ? D.Friction discovering

4.What’s the last column(栏目)?

A. THINK IT OVER!????????????? ????????????? ????????????? ????????????? ?? B. WHAT HAPPENED?

C.EVERYDAY ACTION:????????????? D. WORK WITH PARENTS

阅读理解

　　The world itself is becoming much smaller by using modern traffic and modern communication means(通讯设备). Life today is much easier than it was hundreds of years ago, but it has brought new problems. One of the biggest problems is pollution(污染). To pollute means to make things dirty. Pollution comes from many ways. We see it, smell it, drink it and even hear it.

　　Man has been polluting the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many people. When the land was used up or the river was dirty in one place, man moved to another place. But this is no longer true. Man is now slowly polluting the whole world.

　　Air pollution is still the most serious. It's bad for all living things in the world, but it is not the only one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us angry more easily.

　　Many countries are making rules(法规) to fight against pollution. They stop people from burning coal(煤) in houses and factories in the city, and from putting dirty smoke into the air. Pollution by SO₂ is now the most dangerous kind of air pollution. It is caused(引起) by heavy traffic. We are sure that if there are fewer people driving, there will be less air pollution.

　　The earth is our home. We must take care of it. That means keeping the land, water and air clean. And we must take care of the rise in pollution at the same time.

1．________, our world is becoming much smaller.

[　　]

A．Because of the rise in pollution

B．Thanks to science development(发展)

C．Because the earth is being polluted day and night

D．Because the earth is blown away by the wind every year

2．Hundreds of years ago, life was ________ it is today.

[　　]

3．Pollution comes in many ways. We can even hear it. Here “it” means ________.

[　　]

4．Air pollution is the most serious kind of pollution because ________.

[　　]

A．it makes much noise

B．it makes us angry more easily

C．it makes our rivers and lakes dirty

D．it's had for all living things in the world

5．Which of the following is NOT true?

[　　]

A．Many countries are making rules to fight against pollution.

B．The pollution of the earth grows as fast as the world population does.

C．The problem of pollution is not so serious because there are not so many people living on the earth.

D．If people could go to work by bus or bike instead of car or motorbike, it would be helpful in fighting against the problem of SO₂.

A．It's Tree Planting Day today.　　B．You'd better be careful next time.

C．How dirty your clothes are!　　 D．It's not very far from our school, you know.　　 E．It doesn't matter.