Imagine that the genome （基因组） is a book．...

It is reported that conservation groups in North America have been arguing about the benefits and dangers of wolves. Some groups believe wolves should be killed. Other people believe wolves must be protected so that they will not disappear from the wilderness (荒野)

For Killing Wolves

In Alaska, the wolf almost disappeared a few years ago, because hunters were killing hundreds of them for sport. However, 1aws were established to protect the wolves from sportsmen and people who catch the animals for their fur. So the wolf population has greatly increased. Now there are so many wolves that they are destroying their own food supply.

A wolf naturally eats animals in the deer family. People in the wilderness also hunt deer for food. Many of the animals have been destroyed by the very cold winters recently and by changes in the wilderness plant life. When the deer can’t find enough food, they die.

If the wolves continue to kill large numbers of deer, their prey (猎物) will disappear some day. And the wolves will, too. So we must change the cycle of life in the wilderness to balance the ecology(生态平衡）. If we killed more wolves, we would save them and their prey from dying out. We’d also save some farm animals.

In another northern state, wolves attack cows and chickens for food. Farmers want the government to send biologists to study the problem. They believe it necessary to kill wolves in some areas and to protect them in places where there is a small wolf population.

Against Killing Wolves

If you had lived long ago, you would have heard many different stories about the dangerous wolf. According to most stories, hungry wolves often kill people for food. Even today, the stories of the “big bad wolf'” will not disappear.

But the fact is wolves are afraid of people, and they seldom travel in areas where there is a human smell. When wolves eat other animals, they usually kill the very young, or the sick and injured .The strongest survive .No kind of animal would have survived through the centuries if the weak members had lived. And has always been a law of nature.

Although some people say it is good sense to kill wolves, we say it is nonsense! Researchers have found wolves and their prey living in balance. The wolves keep the deer population from becoming too large, and that keeps a balance in the wilderness plant life.

The real problem is that the areas where wolves can live are being used by people. Even if wilderness land is not used directly for human needs, the wolves can’t always find enough food. So they travel to the nearest source, which is often a farm. Then there is danger. The“big bad wolf”has arrived! And everyone knows what happens next.

1.Some people are against killing wolves because ________.

2.According to those against killing wolves, when wolves eat other animals, ________.

3.The last sentence “And everyone knows what happens next” implies that in such cases _______.

Whatever field we are involved in，we always have to look for ways to expand our knowledge.An increase in knowledge in a particular subject can lead to a better understanding，grasp，judgment，intelligence and ability in that area.So how do we go about gaining knowledge?

I think people are the biggest source of knowledge for anybody.Right from childhood，we have learned things by watching others.Whatever field you want to gain knowledge in，there must be many who have experience in that field.So make use of this valuable source of information by learning from the experience，success，mistakes and skills of others. Study carefully and associate with people who are experts in the field you want to gain knowledge in.

The next best source of knowledge should be books.There are millions and millions of books in every language and on almost any topic imaginable.Whatever problem you are facing must have been faced by somebody else before，and its solution is likely to have been preserved in the form of a book.If you are serious about gaining knowledge about a topic，then read any book，magazine，article etc.You can lay your hands on the books related to that topic.Read as much as you can.

It is said that experience is a great teacher，so learn from your past experience and the experience of others.Learn from your and others’ past and present achievements as well as mistakes.

Experimenting with new things and observing new things can help you learn very quickly. Keep in mind，though，that while experimenting，you may encounter a few failures , too.Do not become discouraged as failures are a part of the learning curve，especially while attempting something new.Try to earn from failures instead of becoming disheartened.

1.Which of the following statements is TRUE according to this text?

2.If a person decides to learn about a topic，he or she should________.

3.The author would NOT agree that________.

4.This text mainly talks about________.

After 21 years of marriage，my wife wanted me to take another woman，my widowed mother, out to dinner and a movie．Due to the  31  of my work and my three children，I visited her only  32  ．That night I called inviting her to go out．Though a bit   33 ，she accepted it happily．

That Friday after work，I drove over to  34  her up．On reaching her house，I noticed that she seemed to be nervous about our 35 ．Wearing the dress she had worn to    36   her last wedding anniversary，she smiled like an angel．

We went to a  37  that，although not elegant，was very comfortable．After we sat down，I    38  my eyes and saw Mom sitting there staring at me．A smile was on her lips．“I used to have to   39  the menu when you were smal1，”she said．“Then it’s time you relaxed and let me return the   40  ，”I responded．During the dinner，we had such a   41  conversation-all about each other’s life—that we 42 the movie．When back home, she said, “Pity we didn’t see the film．Yet I’ll go out with you again, but only if you let me   43  you．” I agreed．

A few days later，Mother died of a massive heart attack．It   44  so suddenly that I had no  45  to do anything for her．some time later，I   46  an envelope of a copy of a restaurant receipt from where mother and I had   47  ．An attached note said，“I paid this   48   in advance．I wasn‘t sure whether I could be there；but nevertheless，I paid for two—one for you and the other for your wife．You’ll never know   49   that night meant for me．I love you, son．”

At that moment．I understood the importance of giving our loved ones the time they   50   because these things can never be put off till “some other time”．

 —Do you think it a good thing if too high house prices can't be brought under control .

—________，it was bad.

 On the bank of the river, we found him _______on a bench, with his eyes_______ on a kite  in the sky.