单选题In this experiment, Robert Rosenthal and Lenore Jacobson studied the way that innocent subjects might be affected by another person's expectations. First, they gave an intelligence test to the entire student body at an unnamed primary school in the San Francisco area. Then, they selected students at random(随便) and told their teachers that the students' tests had shown that they were about to experience a period of rapid learning. Teachers did not change their methods or materials for teaching the selected students, but, at the end of the year, when the test was administered (实施) again, first and second graders who had been selected had, in fact, gained twice as many IQ points as the other children. The experimenters concluded that they had performed better because they had been given more attention. Teachers had challenged them and had given them more positive reinforcement because they had expected more from them.

单选题His speech was careful and ______ , but his words seemed to make no sense. A. distinctive B. distinct C. distinguishable D. diligent

单选题Insects live in bushes and grass and trees, in fields and houses and in the ground. Some even live on other animals. Did you know that there are more insects in the world than any other kind of animal? They fly and hop and crawl and dig. Some insects, the ants, build hills and cities of their own. Insects called silk worms spin silk. Bees make honey. And crickets(蟋蟀) make music with their feet. Lots of insects grow up in a curious way. When they are little, they look like tiny worms, and most of their lives are spent in just growing. Mosquitoes(蚊子) start this way, and so do beetles(甲虫) and flies, ants and bees. Some caterpillars (毛虫) grow into butterflies. Other wormlike wriggling (蠕动) things become moths (蛾). So all insects do not look the same. Worms in fruit are insects. So are caterpillars and potato beetles, flies and moths. The things that some insects do are helpful to people. They spin silk and make honey and help the flowers to make seeds. Some insects are pests. They bite and sting (叮) and eat our plants and clothes, food and even furniture. Insects are everywhere.

单选题What'swrongwiththeman?

单选题

单选题Both sides could make these talks succeed ______ seeking common ground.[A] with[B] at[C] for[D] by

单选题How does the woman play tennis?

单选题______ her words were spoken, there was no mistaking that she was pleased.

单选题--You didn't write to Tom?-- ______ him, too?

单选题--We're going to have a picnic tomorrow. Why don't you come with us? --______, but I'm having a friend over.[A] I'd like to[B] You're right[C] I don't mind[D] Maybe next time

单选题We walked so quietly that the nurse at the desk didn't even lift her eyes from the hook. Mum pointed to a big chair by the door and I knew she wanted me to have a seat. While I watched, mouth open in surprise, mum took off her hat and coat and gave them to me to hold. She walked quietly to the small room by the lift and took out a wet mop (拖把). She pushed the mop past the desk and as the nurse looked up, mum nodded and said, "Very dirty floors." "Yes. I'm glad they've finally decided to clean them," the nurse said. She looked at mum strangely and said, "But aren't you working late?" Mum just pushed harder, each swipe (拖) of the mop taking her farther and farther down the hall. I watched until I couldn't see her and the nurse had turned back to write in the big book. After a long time mum came back. Her eyes were shining. She rapidly put the mop back and took my hand. As we turned to go out of the door, mum nodded politely to the nurse and said, "Thank you." Outside, mum told me: "Dagmar is fine. No fever." "You saw her, mum?" "Of course. I told her about the hospital rides, and she will not expect us until tomorrow. Dad will stop worrying as well. It's a fine hospital. But such floors! A mop is no good. You need a brush./

单选题D WASHINGTON—Nearly 40 million children in developing countries stand to lose one or both parents due to AIDS (艾滋病) over the next 13 years, and almost 3 million children under 15 have caught the disease worldwide, US experts said. "More than 40 million children in 23 developing nations will likely have lost one or both their parents by 2010. Most of these deaths will be the result of the HIV/AIDS and complicated illnesses." Brian Atwood, a US official said. Meanwhile, since the first report death of a child by AIDS in Los Angelesl5 years ago, almost 3 million children under 15 are estimated (估计) to have caught the disease worldwide, and at least 1000 were dying each day. "In countries across Africa, Asia and Latin America, HIV/AIDS is pulling years of progress in economic and social development," he added. "Life expectancy (估计寿命) which has been steadily on the rise for last thirty years will drop to 40 years or less in nine African countries by the year 2020." Atwood said serious work to help stop children from dying in developing countries was being wiped out. "In all 23 countries included in this study, AIDS-related death will take away the gains made in child survival over the past 20 years. In Zambia and Zimbabwe, children's death rates will likely nearly double," Atwood said.

单选题Hard Work Is Good for Health Scientists find that hardworking people live longer than average men and women. Career women (职业女性) are healthier than housewives. Evidence shows that the jobless are in poorer health than the job-holders. An investigation (调查) shows that whenever the unemployment rate increases by 1%, the death rate increases by 2%. All these seem to support one point: work is helpful to health. Why is work good for health? It is because work keeps people busy, away from loneliness. Researches show that people feel unhappy and worried when they have nothing to do. Instead, the happiest are those who are busy. Many high achievers who love their careers feel that they're happiest when they are working hard. Work serves as a bridge between man and reality. By work, people come into contact with each other. By collective (集体的) activity, they find friendship and warmth. This is helpful to health. The loss of work means the loss of everything. It affects man spiritually (精神上 地) and makes him easy to get sick. Besides, work gives one a sense of achievement. Work makes one feel his value and status (地位) in society. When a writer finishes his writing or a doctor successfully operates on a patient or a teacher sees his students grow, they are happy beyond words. From the above we can come to the conclusion that the more you work, the happier and healthier you will be. Let us work hard and study well and live a happy and healthy life.

单选题As there was a power cut in the hospital, the surgeon had to ______ the operation.

单选题—How many people are still leading______life under______poverty hue in China ? —Perhaps one fifth.[A] a; the[B]a; a[C]/; /[D]the; /

单选题It is said that Sally's been painting for years since she was a little girl, ______?[A] isn't she[B] hasn't it[C] hasn't she[D] doesn't it

单选题Shanghai is a big city. It is ______the southeast of China.[A] in[B] at[C] on[D] to

单选题Which of the following is suggested in the passage?

单选题Recent study shows that regular review leads to ______performance on tests.

单选题Whatisthewomangoodat?