完形填空

　A pine tree in California was regarded （看作）the oldest tree in the world. People thought 　1　 was nearly 5,000 years old. 　2　　 　they could not be 　3　　 　. Then someone 　4　 the tree down 　5　　 　a chain saw （链式锯）。Kiling the 　6　　 　tree in the world was a 　7　　 　thing to do. But when the tree 　8　　 　down, 　9　　 　knew its 　10　　 　. It was 4,900 　11　　 　.

　How can you 　12　　 　the age of a tree? If you ever 　13　　 　a tree that has just 　14　　 　cut down, take a look at the cut 　15　　 　. You will see rings. There are little rings in the middle. 　16　　 　each ring is a larger one. The ring 　17　　 　the bark （树皮）is the biggest one of 　18　　 　.

　Count these rings. A tree grows one ring each 　19　　 　. A ten-year-old tree has ten rings. A sixty-year-old tree has sixty rings. 　20　　 　rings does a 4,900-year-old tree have?

用所给动词的适当形式填空：

What do people do with their old, out-of-date but still useful computers? Most people don’t know what to do with them. Many old computers are put away in homes. Many more are simply thrown out with the rubbish.　　
Some companies are thinking of ways to bring down the number of old computers. Sony has agreed to help recycle old Sony products. Dell, Hewlett-Packard and other companies now also take back some old computers.　　
In some countries, laws are being passed, too. Computer companies will have to collect and recycle their used products. And 70% of computer waste must be recycled. The idea behind the laws is that computer companies themselves should pay the cost. That will encourage them to make computers that are easier and cheaper to repair and upgrade（升级）.　　
Yet while many people are throwing away good computers, others cannot afford them at all. Hundreds of organizations are working to solve this problem. They collect and repair old computers. Some also teach others how to repair computers.　　
The computers then go to schools, charities and people who need them. Giving a used computer to one of these organizations can turn one person’s rubbish into someone else’s useful things—and cut down on waste, too.　　

1. 1.

   How do people usually deal with their old computers?　　

   1. A.
      They stop using them
   2. B.
      They give them to others
   3. C.
      They fix them up.　　
2. 2.

   What do some computer companies do to bring down the number of old computers?　　

   1. A.
      They don’t do anything about them.　　
   2. B.
      They take back some old ones.       　　
   3. C.
      They donate them to some charities.　　
3. 3.

   According to some countries’ laws, what must computer companies do?　　

   1. A.
      Collect and recycle most of computer waste. 　　
   2. B.
      Repair and upgrade old computers.      　　
   3. C.
      Make much cheaper computers.　　
4. 4.

   What may people who can’t afford computers think of the used computers?　　

   1. A.
      Expensive
   2. B.
      Useful
   3. C.
      Out-of -date.　　
5. 5.

   What is the passage about?　　

   1. A.
      Repairing old computers.　　
   2. B.
      Selling old computers.              　　
   3. C.
      Recycling old computers. 　

A thousand years ago Hong Kong was covered by a thick forest. As more and more people came to 　31　 in Hong Kong, these trees were cut down and burnt. Now there is　32　 forest left, though there are still some small areas covered with trees. We call these woods.
　　Elephants, tigers and many　33　 animals were living in the thick forest. When people came to live in Hong Kong, the　34　 began to die out. Early farmers grew rice and　35　 pigs and chickens in the valleys. They cut down the trees and burnt them. They needed　36　 to keep themselves warm in winter, to cook their food and to keep away the dangerous animals. Elephants quickly disappeared because there was not enough food for them. 　37　 did most of the wolves and tigers. Monkeys and many other animals soon　38　 in the same way.
　　You might think that there are no longer any animals in Hong Kong　39　 in the zoos. But there are still about 36 different animals　40　 there. One of the most interesting of Hong Kong's animals is the barking deer. These are beautiful little animals　41　 a rich brown coat and a white patch (补丁) under the tail. They look like deer but they are much smaller. They are less than two feet　42　. They make a noise rather like a dog　43　. In Hong Kong the barking deer has only a real enemy--　44　. People hunt these little animals though it is illegal (违法的). There are now not many barking deer left. So it is important　45　 people to protect wild animals.

What do people do with their old, out-of-date but still useful computers? Most people don’t know what to do with them. Many old computers are put away in homes. Many more are simply thrown out with the rubbish.　　
Some companies are thinking of ways to bring down the number of old computers. Sony has agreed to help recycle old Sony products. Dell, Hewlett-Packard and other companies now also take back some old computers.　　
In some countries, laws are being passed, too. Computer companies will have to collect and recycle their used products. And 70% of computer waste must be recycled. The idea behind the laws is that computer companies themselves should pay the cost. That will encourage them to make computers that are easier and cheaper to repair and upgrade（升级）.　　
Yet while many people are throwing away good computers, others cannot afford them at all. Hundreds of organizations are working to solve this problem. They collect and repair old computers. Some also teach others how to repair computers.　　
The computers then go to schools, charities and people who need them. Giving a used computer to one of these organizations can turn one person’s rubbish into someone else’s useful things—and cut down on waste, too.　　
【小题1】 How do people usually deal with their old computers?　　
A. They stop using them. B. They give them to others.   C. They fix them up.　　
【小题2】 What do some computer companies do to bring down the number of old computers?　　
A. They don’t do anything about them.　　
B. They take back some old ones.       　　
C. They donate them to some charities.　　
【小题3】According to some countries’ laws, what must computer companies do?　　
A. Collect and recycle most of computer waste. 　　
B. Repair and upgrade old computers.      　　
C. Make much cheaper computers.　　
【小题4】 What may people who can’t afford computers think of the used computers?　　
A. Expensive.        B. Useful.         C. Out-of -date.　　
【小题5】 What is the passage about?　　
A. Repairing old computers.　　
B. Selling old computers.              　　
C. Recycling old computers.