C

Not many years ago, some American farmers began to complain about hawks(鷹). The hawks were killing chickens. The farmers did not know what to do. They went to the government officials and asked for help.

The officials said, “ We’ll pay you for each hawk you kill.” The farmers began to kill the hawks. Many hawks were killed, but the farmers now had another problem. The field mice were growing in number and they were eating up the farmers’ corn. Hawks eat not only chickens but also field mice. They eat more field mice than chickens. But if the farmers had known that, they would not have upset(打亂) the balance of nature. In one part of the USA, there are deer which eat a kind of wild rose. The deer are eaten by mountain lions. The number of deer, mountain lions, and wild rose does not change much if people stay away from them. If there are too many deer, mountain lions will increase rapidly in number and kill many deer. If there are too many mountain lions, there will be fewer deer and there will be more roses.

It is always necessary for us to keep the balance of nature. The government once killed almost all the mountain lions to protect the deer. Soon there were so many deer that they ate up all the wild roses. Then they began to eat the green leaves of young trees which were important to the farmers.

So the farmers protected their trees from the deer. The deer had nothing to eat, and many of them died.

The government learned a valuable lesson from nature.

44. What had happened after the hawks were killed?

   A. People wouldn’t worry about their chickens.

   B. The number of the field mice became too large.

   C. The number of the field mice became small.

   D. The field mice were eating up the farmers’ corn.

45. Why did American people have to protect their trees?

   A. Because the mountain lions destroyed the trees.

   B. Because there were so many deer that they began to eat the green leaves.

   C. Because they wanted the trees to grow well.

   D. Because the trees are more important than the deer.

46. What can we learn from the article?

   A. We must keep the balance of nature.

   B. We must not kill any animals.

   C. we must feed the hawks with our corn to keep the balance of nature.

   D. Both A and B.

You will never     all your homework tonight if you don’t fix your attention on it.

  A. get on with           B. get back                   C. get in                       D. get through

 If you live here for a longer time, you will       all the people here.

  A. know              B. know about              C. get to know         D. known

The basin       water soon. You can’t pour more in.

  A. is full with            B. fills with                  C. is filled of  D. is filled with

Let’s not wait any longer. He might not      at all.

  A. turn over              B. turn up              C. turn on              D. turn down

They _____ coal, and had to _____ wood.

A. ran out of;  make full use of           B. ran out;  make full use

C. ran short of;  made good use of          D. ran through;  make good use of

Peter is my close friend, who can be       what he promises.

  A. relied on to do             B. relied to do   C. relied on doing     D. relying to doing

I feel a cold       .

  A. come in         B. coming on         C. comes from              D. came out of

The employee     to impress the company with his cleverness and promptness.

  A. set about        B. set out               C. set off        D. set up

Some people don’t believe that driving more slowly can save lives. But the truth is that driving more slowly can help a person to avoid serious accidents.

The following chart shows the distance that it takes to stop a car at a given speed. The distance is measured in feet. The shaded area shows the driver’s thinking distance. That’s the distance it takes for the driver to react to a danger that he sees. The white area shows the car’s braking distance. That’s the distance it takes for the car to stop once the brakes are used. The number at the top of each bar shows the total number of feet that it takes to stop the car

1. According to the chart, what is the total number of feet needed to stop a car that is traveling at 50 miles per hour?

A. 55.    B. 73.    C. 128.    D. 183.

2. What is the braking distance for a car that is traveling at 60 miles per hour?

A. 66 feet.    B. 119 feet.    C. 185 feet.    D. 251 feet.

3. Which of the following statements about braking and speed is TRUE?

A. The braking distance is what it takes for the driver to react to a danger that he sees.

B. The speed of a car has a direct effect on the distance needed to stop the car.

C. The braking distance increases only when a driver drives faster than 50 miles per hour

D. Driving slowly can help a person to avoid all accidents

4. The underlined word probably means _____.

 A. equipment for slowing down or stopping    B. object that turns around

 C. object to control the direction in a car    D. large glass window at the front of a vehicle