Cloning has the potential to change society. For some,it’s a welcome development designed to make our lives easier. For others,it represents a threat to the health and balance of society,especially from a moral perspective(角度). Looking at these cloning pros and cons,it’s important to consider the scientific,financial,and social aspects of cloning processes.

From a scientific perspective,cloning can be considered major progress. Scientists aren’t limited by population. It’s also possible to clone pieces of living things.

However,cloning changes the natural order of life and death. Why should scientists have to treat an animal well in the lab if they can just make more? As a result,scientists may become lazy or careless with the living things they work on.

Cloning is a major business. Medical research groups have invested millions of dollars in making cloning possible. As a result,they can make big profits from selling cloning services to hospitals and the public. However,the wealth they achieve doesn’t mean that cloning itself is a profitable trial. For example,while a company may clone an organ,its price may be too high to afford. As a result,only rich people and governments could use cloning products.

As a whole,cloning for society can be debated for hours. On one hand,you have religious groups,who say that cloning is wrong. On the other hand,you have many people who are looking forward to making clones of themselves so that the clone can serve as a worker and leave the original person to enjoy a life of relaxation and wealth.

1.We can conclude from the first paragraph that ________.

A. opinions about cloning vary from person to person

B. more people think little of the benefits of cloning

C. cloning has the potential to change society for better

D. people should think of cloning in a more scientific way

2.Why do some people think cloning has a bad effect on scientific experiments?

A. More money may be spent on cloning other living things.

B. Scientists will become careless with their experiments.

C. Cloning may disturb the balance of nature and wildlife.

D. Scientists may ignore the living things they work on.

3.What is the disadvantage of cloning products put into the market?

A. More fake cloning products will crowd into the market soon.

B. Only a limited group would have access to cloning products.

C. Patients have to buy cloning products from hospitals or governments.

D. Scientists may pay attention to quantity of cloning products rather than quality.

Next autumn when you see wild geese heading south for the winter flying in a V formation, you might think about what scientists have discovered as to why they fly that way.

As each bird flaps its wings, it creates uplift(提升) for the bird immediately following. By flying in a V formation the whole group adds at least 71% greater flying range than if each bird flies on its own.

People who share a common direction and sense of community can get where they are going more quickly and easily because they are traveling on the push of one another.

When a wild goose falls out of the formation,it suddenly feels the drag and resistance of trying to go alone and quickly tries to get back into the formation to take advantage of the lifting power of the bird in front. When the head goose gets tired,it flies back into the formation and another goose flies to the front. It is wise to take turns doing difficult jobs whether it is people or wild geese flying south.

Wild geese honk (发出雁叫声) from behind to inspire those up front to keep up their speed. What can we learn from this?

When a wild goose gets sick or wounded by gunshots,and falls out of the formation,two other geese will fall out with that goose and follow it down to lend help and protection. They will stay with the fallen goose until it is able to fly or until it dies,and only then will they go on with their own or with another formation to catch up with their group.

1.Wild geese fly in a V formation in order to________.

A. protect themselves from danger

B. fly more quickly and easily

C. help the sick and wounded

D. fly much higher in the sky

2.What can we learn from the fifth paragraph?

A. We should try to lead others to move forward.

B. We should give people facing difficulties encouragement.

C. We should believe in those who offer us help.

D. We should care more about the old and sick.

3.When a wild goose becomes sick or is wounded,________.

A. it will be left alone and will fall on the ground

B. the whole group will stop flying

C. two other geese will stay with it to offer help

D. other geese will honk to give it encouragement

4.What do we know from the passage?

A. A wild goose can help the one following it by flapping its wings.

B. A person who works alone can work better than one who doesn’t.

C. It is not good for wild geese to take turns being the head goose.

D. The wild geese that fall behind are unlikely to catch up with their group.

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