A lot of girls want to be singers, but     can realize their dreams.

A. some                           B. any                       C. few                      D. many

用单词或短语替换划线部分的词或短语。 (共6题；每小题1分，满分6分) 

注意：一格不限一词

  1. To tell the truth, a lot of people want to be rich and famous.   _______________

  2. The endangered animals he mentioned in his lecture may become extinct any time.

    ________________

3. They completely changed the design. You have no choice but to follow the new one.

   ________________

4. Anyhow, my goal is to supply humans with a life of high quality.   _______________

5. Their performances were humorous enough to be followed by other groups. __________________

6. It’s a great duty but also a great honor to be chosen as a volunteer for the World Expo.

   ________________

The population conference in Brasilia has now ended. One of the aims of the conference was for countries from each continent to look back at past experiences and to learn from them for the future.
In Europe
Population problems are different in different parts of the world.  For example, in many European countries the population is getting older. The birth rate is very low because many young people have only one child or none at all. People are living longer, too. On average, men tire to 76 and women to 78. By 2050 around 25 % of the population of some European countries will be over 60 years old.
This change has happened very fast within two generations. If governments had expected this change, they would have encouraged people to prepare more for old age. At the moment many old people are very lonely and often very poor. If people had expected to live so long, they would probably have saved more money for their retirement.
In Africa
In Africa, the problems of the future will be very different. There, the population is doubling every 24 years. Many families continue to have large numbers of children to look after older people and to help on the land. However, better medical services have increased life expectancy and more children survive to become adults. Research shows that the size of the family is connected with the standard of women’s education. If more girls had gone to school in the last 20 years, family size in Africa would probably not have continued to be so big.
In Asia
In contrast, the problem in Asia is not just population growth but also overcrowding in many cities. Traditionally, most people have lived in the countryside, but within the next 25 years more than 65% will live in cities. If Asian countries had expected this kind of change 20 years ago, they would have tried to provide more work and better education in the countryside. This is starting to happen now, but it may be too late.
56. What is the cause of African population problem?
A. Low birth rate and increased life expectancy. B. More older people, more children.
C. People’s moving from the countryside to the cities.
D. Better medical services and increased life expectancy.
57. Which of the following is NOT true according to the passage?
A. In Europe it is normal to live to be 76 or more.
B. Medicine has changed population patterns.
C. Population problems are the same everywhere.
D. Many old people in Europe experience poverty.
58. What can be inferred from the passage?
A. Cities everywhere are becoming larger and larger.
B. Asian countries have tried to provide more work for people.
C. A lot of girls couldn’t go to school in Africa.
D. The older people in Europe are, the lonelier they will be.

Scientist Says ‘No’ to Human Cloning

“I’ve never met a human worth cloning,” says cloning expert Mark Westhusin from his lab at Texas A&M University. “It’s a stupid endeavor.”

That’s an interesting choice of adjective, coming from a man who has spent millions of dollars trying to clone a 13-year-old dog named Missy. So far, he and his team have not succeeded, though they have cloned two cows and a cat.

They just might succeed in cloning Missy soon — or perhaps not for another five years.

Westhusin's experience with cloning animals leaves him upset by all this talk of human cloning. In three years of work on the Missy project, using hundreds upon hundreds of dog's eggs, the A&M team has produced only a dozen or so embryos carrying Missy's DNA. None have survived the transfer to a surrogate（代孕的）mother. The wastage of eggs and the many spontaneously aborted(流产，发育不全) fetuses（胎）may be acceptable when you're dealing with cats or bulls, he argues, but not with humans. “Cloning is incredibly inefficient, and also dangerous,” he says.

Even so, dog cloning is a commercial opportunity, with a nice research payoff. Ever since Dolly the sheep was cloned in 1997, Westhusin's phone has been ringing with people calling in hopes of duplicating their cats and dogs, cattle and horses. “A lot of people want to clone pets, especially if the price is right,” says Westhusin. Cost is no obstacle for Missy's mysterious billionaire owner; he's put up $3.7 million so far to fund A&M's research.

Contrary to some media reports, Missy is not dead. The owner wants a twin to carry on Missy's fine qualities after she does die. The prototype（原型；雏形）is, by all accounts, athletic, good-natured and supersmart. Missy's master does not expect an exact copy of her. He knows her clone may not have her temperament（气质、性情）. In a statement of purpose, Missy's owner and the A&M team say they are “both looking forward to studying the ways that her clones differ from Missy.”

Besides cloning a great dog, the project may contribute insight into the old question of nature vs. nurture. It could also lead to the cloning of special rescue dogs and many endangered animals.

However, Westhusin is cautious about his work. He knows that even if he gets a dog pregnant, the offspring, should they survive, will face the problems shown at birth by other cloned animals: abnormalities like immature lungs and heart and weight problems~ “Why would you ever want to clone humans,” Westhusin asks, “when we're not even close to getting it worked out in animals yet?”

1.By “stupid endeavor”, Westhusin means to say that ________.

2.What does the first paragraph tell us about Westhusin's dog cloning project?

3.By cloning Missy, Mark Westhusin hopes to ________.

4.We learn from the passage that animal clones are likely to have ________.

用单词或短语替换划线部分的词或短语。 (共6题；每小题1分，满分6分) 

注意：一格不限一词

  1. To tell the truth, a lot of people want to be rich and famous.   _______________

  2. The endangered animals he mentioned in his lecture may become extinct any time.

    ________________

3. They completely changed the design. You have no choice but to follow the new one.

   ________________

4. Anyhow, my goal is to supply humans with a life of high quality.   _______________

5. Their performances were humorous enough to be followed by other groups. __________________

6. It’s a great duty but also a great honor to be chosen as a volunteer for the World Expo.

   ________________