Since people first sent rockets into space in the 1950s, we have been leaving behind all sorts of things. Some of them, like the camera, were lost by astronauts while they did work outside their spaceship. But much of the space junk is made up of little pieces of things that were once bigger objects, until they struck each other and broke apart.

Some things we send into space fall back toward the earth and burn up in the atmosphere. But larger pieces sometimes survive the extreme heat and hit the ground or the ocean at great speeds. So there is always concern that something may fall from the sky and do some harm.

But space junk falling on housetops (屋顶) is not the biggest worry. Scientists are concerned about what happens when an empty rocket strikes another while orbiting (绕轨道飞行) the earth. Two big things become many smaller things. They then hit other things. The pieces get smaller and smaller until they form a cloud of junk that blocks the path of future space vehicles.

So what can be done to clean up the space around our planet? Marco Castronuovo, an Italian researcher, talks about sending a satellite into space that would get very close to some of the larger pieces of space junk. The satellite would connect a small rocket to the useless object. When the rocket explodes, it pushes the junk into a lower and slower orbit, nearer the earth. After a time, the junk burns up in the atmosphere.

Mr. Castronuovo has proposed (提议) using a number of small satellites with robotic arms. One arm would catch the space junk, and another arm would connect the rocket. He imagines that each satellite would jump from one large piece of junk to another. He thinks this method could destroy about ten large objects each year.

Scientists have been concerned about space junk for many years. Right now, the costs of the clean-up have been too great. Mr. Castronuovo says his system could be put in place for a much more reasonable amount of money.

1.Much of the space junk _____.

A．was thrown by the astronauts

B．is from broken spaceship

C．is made up of small pieces of things

D．returns to the earth piece by piece

2.Scientists are most worried that the space junk _____.

A．will stop the future space vehicles

B．will do harm to the atmosphere

C．will fall on the housetops

D．will burn up in space

3.What does Marco Castronuovo think of his system?

A．It can remove space junk completely.

B．It can save a large amount of money.

C．It can create a large amount of space.

D．It can develop robotic technology.

What do you know about the sea? We know that it looks very pretty when the sun is shining on it. We also know that it can be very rough when there is a strong wind. What other things do we know about it?

The first thing to remember is that the sea is very big. When you look at the map of the world you will find there is more water than land. The sea covers three quarters of the world.

The sea is also very deep in some places. It is not deep everywhere. Some parts of the sea are very shallow. But in some places the depth of the sea is very great. There is one spot, near Japan,  where the sea is nearly 11 kilometers deep! The highest mountain in the world is about 9 kilometers high. If that mountain were put into the sea at that place, there would be 2 kilometers of water above it! What a deep place!

If you have swum in the sea, you know that it is salty. You can taste the salt. Rivers, which flow into the sea, carry salt from the land into the sea. Some parts of the sea are saltier than other parts. There is one sea, called the Dead Sea, which is very salty. It is so salty that swimmers cannot sink! Fish cannot live in the Dead Sea!

In most parts of the sea, there are plenty of fish and plants. Some live near the top of the sea. Others live deep down. There are also millions of tiny living things that float in the sea. These floating things are so small that it is hard to see them. Many fish live by eating these floating things.

The sea can be very cold. Divers who go deep down in the sea know this. On the top the water may be warm. When the diver goes downwards, the sea becomes colder and colder. Another thing happens. When the diver goes deeper, the water above presses down on him. It squeezes him. Then the diver has to wear clothes made of metal. But he cannot go very deep. Some people who wanted to go very deep used a very strong diving ship!  They went down to the deepest part of the sea in it. They went down to a depth of eleven kilometers!

66. When does the sea look beautiful?

A. When it is calm.

B. When the weather is fine.

C. When there is a strong wind.

D. When there is a storm.

67. How much of the earth’s surface does land cover?

A. 15%                 B. 25%                  C. 30%                 D. 45%

68. Why does the author mention the sea somewhere near Japan?

A. To show that the sea in some places is very deep.

B. To show that the sea in some places is very shallow.

C. To show that its depth is 9 kilometers greater than the height of the highest mountain.

D. To show that its depth is 11 kilometers greater than the height of the highest mountain.

69. Which of the following statements about the Dead Sea is NOT true?

A. There are plenty of fish in it.

B. It is a safe place for swimmers.

C. It is extremely salty.

D. No fish can be found in it.

70. Why can’t people go very deep in the sea?

A. Because the deepest part of the sea is very cold.

B. Because the deepest part of the sea is very rough.

C. Because the pressure of the water at great depths is unendurable.

D. Because fierce fish usually live there.

In Britain, people have different attitudes to the police. Most people generally    1    them and the job they do-although there are certain people who do not believe that the police should have the power that they do.

    What does a policeman actually do? It is not a(n)   2  job to describe. After

all, a policeman has a number of jobs in one. A policeman often has to control traffic,either on foot in the center of a town, or in apolice car on the roads. Indeed, in Britain, he might be in the Traffic Police and spend all, or a lot of, his time   3up and down main roads and motorways. A traffic policeman has to help keep the traffic moving, stop   4   motorists and help when there is an accident.

    A policeman has to help keep the   5 , too. If there is a fight or some other

disturbance, we   6   the police to come and restore order. And they often have to7   situation at great risk to their own   8  .

    We expect the police to solve crimes, of course; so an ordinary policeman,

9   he is not a detective(???), will often have to help   10  and arrest criminals.

    And who do we call when there is an emergency-an air crash, a   11  , a

road accident, or a robbery? We call the police. So a policeman has to be   12   to face any unpleasant emergency that may happen in the   13  world.

    The police do an absolutely necessary job. They do it   14   well and I

support them, but I do not envy policemen. I do not think that I could  15   do

the job of a policeman.  

1.A.dislike        B.join          C.appreciate     D.admire

2.A.funny          B.pleasant      C.interesting    D.easy  

3.A.walking        B.driving       C.wandering      D.searching

4.A.resting        B.tired         C.speeding       D.drunken

5.A.peace          B.silence       C.situation      D.condition

6.A.wait for       B.call          C.think of       D.expect

7.A.turn to        B.avoid         C.deal with      D.treat

8.A.safety         B.families      C.future         D.friends

9.A.although       B.as if         C.however        D.even if

10.A.get rid of    B.question      C.look for       D.sentence

11.A.power failure B.fire          C.thunder storn  D.thief

12.A.provided      B.promised      C.prepared       D.presented

13.A.future        B.modern        C.real           D.whole

14.A.extremely     B.specially     C.surprisingly   D.particularly

15.A.hardly        B.forever       C.ever           D.never

Since people first sent rockets into space in the 1950s, we have been leaving behind all sorts of things. Some of them, like the camera, were lost by astronauts while they did work outside their spaceship. But much of the space junk is made up of little pieces of things that were once bigger objects, until they struck each other and broke apart.
Some things we send into space fall back toward the earth and burn up in the atmosphere. But larger pieces sometimes survive the extreme heat and hit the ground or the ocean at great speeds. So there is always concern that something may fall from the sky and do some harm.
But space junk falling on housetops (屋顶) is not the biggest worry. Scientists are concerned about what happens when an empty rocket strikes another while orbiting (绕轨道飞行) the earth. Two big things become many smaller things. They then hit other things. The pieces get smaller and smaller until they form a cloud of junk that blocks the path of future space vehicles.
So what can be done to clean up the space around our planet? Marco Castronuovo, an Italian researcher, talks about sending a satellite into space that would get very close to some of the larger pieces of space junk. The satellite would connect a small rocket to the useless object. When the rocket explodes, it pushes the junk into a lower and slower orbit, nearer the earth. After a time, the junk burns up in the atmosphere.
Mr. Castronuovo has proposed (提议) using a number of small satellites with robotic arms. One arm would catch the space junk, and another arm would connect the rocket. He imagines that each satellite would jump from one large piece of junk to another. He thinks this method could destroy about ten large objects each year.
Scientists have been concerned about space junk for many years. Right now, the costs of the clean-up have been too great. Mr. Castronuovo says his system could be put in place for a much more reasonable amount of money.
【小题1】Much of the space junk _____.

Maybe ten-year-old Elizabeth put it best when she said to her father, "But, Dad, you can't be healthy if you're dead."

　　Dad, in a hurry to get home before dark so he could go for a run, had forgotten to wear his safety belt-- a mistake 75% of US population make every day. The big question is why.

　There have been many myths about safety belt ever since their first appearance in cars some forty years ago. The following are three of the most common.

　Myth the Number One: It's best to be "thrown clear" of a serious accident.

　　Truth: Sorry, but any accident serious enough to "throw you clear" is able going to be serious enough to give you a very bad landing. And chances are you'll have traveled through a windshield (挡风玻璃)or door to do it. Studies show that chances of dying after a car accident are twenty-five times in cases where people are "thrown clear".

　Myth Number Two: Safety-bets "trap" people in cars that are burning or sinking in water.

    Truth: Sorry again, but studies show that people knocked unconscious (昏迷) due to not wearing safety belts have a greater chance of dying in these accidents. People wearing safety belts are usually protected to the point of having in these accidents. People wearing safety belts are usually protected to the point of having a clear head to free themselves from such dangerous situation, not to be trapped in them.

　Myth Number Three: Safety belts aren't needed at speeds of less than 30 miles per hour (mph).

　Truth: When two cars traveling at 30 mph hit each other, an unbelted driver would meet the windshield with a force equal to diving headfirst into the ground from a height of 10 metres.

Why did Elizabeth say to her father, "But, Dad, you can't be healthy if you're dead"?

 A. He was driving at great speed.

B. He was running across the street.

C. He didn't have his safety belt on.

 D. He didn't take his medicine on time.

The reason father was in a hurry to get home was that he __________.

A. wasn't feeling very well     B. hated to drive in the dark

C. wanted to take some exercise  D. didn't want to be caught by the people

According to the text, to be "thrown clear" of a serious accident is very dangerous because you ________.

A. may be knocked down by other cars.

B. may get serious hurt thrown out of the car

C. may find it impossible to get away from the seat

 D. may get caught in the car door

Some people prefer to drive without wearing a safety belt because they believe _______.

A. the belt prevents them from escaping in an accident

B. they will be unable to think clearly in an accident

C. they will be caught when help comes

 D. cars catch fire easily

What is the advice given in the test?

A. Never drive faster than 30 miles an hour.

B. Try your best to save yourself in a car accident.

C. Never forget to wear the safety belt while driving.

 D. Drive slowly while you're not wearing a safety belt.