单选题—My cousin sent me a wonderful girl from Africa.—Oh, is that so?______?

单选题The human brain contains 10 thousand million cells and each of these may have a thousand connections. Such enormous numbers used to discourage us and cause us to dismiss the possibility of making a machine with human-like ability, but now that we have grown used to moving forward at such a pace we can be less sure. Quite soon, in only 10 or 20 years, perhaps, we will be able to assemble a machine as completes as the human brain, and if we can we will. It may then take us a long time to render it intelligent by loading in the right software (软件) or by altering the architecture but that to will happen. I think it certain that in decades, not centuries, machines of silicon (硅) will arise first to rival and then exceed their human ancestors. Once they exceed us they will be capable of their own design. In a real sense they will be able to reproduce themselves. Silicon will have ended carbon's long control. And we will no longer be able to claim ourselves to be the finest intelligence in the known universe. As the intelligence of robots increases to match that of humans and as their cost declines through economies of scale we may use them to expand our frontiers, first on earth through their ability to withstand environments, harmful to ourselves. Thus, deserts may bloom and the ocean beds be mined. Further ahead, by a combination of the great wealth this new age will bring and the technology it will provide, the construction of a vast, man-created world in space, home to thousands or millions of people, will be within over power.

单选题 It was a really tiring day. I was about to sleep when someone gave me a call. On the other side, a strange farmer was speaking. The man was always the focus of people's conversation. However, I had never known him before. His voice sounded very nervous and he had been talking for several minutes before I began to understand something. Even then what I could {{U}}figure out{{/U}} was that someone called Jane had suffered from a very severe accident. It was snowing heavily and I couldn't figure out the direction. I was driving for about an hour. Then I found his house at last. He was just standing there, waiting for my arrival. It seemed to me that Jane had passed away. "To me, she meant a lot even more than my own wife!" he said with tears. From his face, I could see he was rather sad. At that time I thought something terrible had happened, a possible scandal maybe. When he told me that he had placed her in the barn (厩) , I was quite shocked. "I couldn't leave her in such terrible weather!" he said. Apparently Jane had been his secret lover. I was on the point of telling him he could not ask me to cover anything up when he pushed the barn door, He lit his candle and then I saw a dark and big figure. "She was such a good cow that I won't allow anyone except a doctor to touch her!" he said, and burst out crying again.

单选题Old Fern became angry because ______.

单选题I don't mind what you're doing, as long as you are together, ______ fun.

单选题Antifreezes are so useful that they__________.

单选题Friendly Advice: The main cause for boys and girls to start drinking or smoking is whether they have friends who do, a National Institute of Health study suggests. Researchers find that school children are likely to do the same things as their five closest friends do, and girls are more likely than boys to give in to pressure to drink. However, the parents' role makes a difference: Children whose moms and dads talk and listen to them regularly are less likely to smoke and drink. Crying for a Smoke: New moms are often annoyed by the cries of new-bore babies, but according to one study, there is something they can do about it: Give up smoking. Researchers at a Netherlands organization of scientific research questioned parents of 3,000 babies up to six months old and found that stomachache was three times as likely in small babies whose mothers smoked 15 to 30 cigarettes a day, either before or after their babies were born. No data yet on Dad's smoking, but it's a safe suggestion that he should put the cigarettes out, too. Out of Shape: Even as the number of overweight children increases, many schools are making unhealthy habits worse by cutting back on sports classes. Physical education is meant to provide exercise and encourage lifetime fitness, but a recent study found that only 26% of high schools require at least three years of physical education. It's worse in lower grades: California middle school students get only 25 minutes of physical activity a week.

单选题Johnson has______his things at home. A. left B. forgotten C. remembered D. taken

单选题As everybody knows, there is ______ house in this neighborhood.

单选题I don't think he will come to our party, ______?[A] will he[B] won't he[C] does he[D] do I

单选题WASHINGTON -- considering the serious warnings lately about Internet viruses(病毒), users may don"t use their machines just to keep them safe. In reality, common sense and a few basic tips can keep Internet surfers secure. Anti-virus software is a must, and it should be updated at least once a week to recognize newly viruses. If this is not done, you will meet great troubles. People with broadband Internet connections should have also a firewall. These protect the computer from attacks by hackers(黑客). Then it is time to think about computer habits. Unlike old viruses, which spread only through shared disks, the Internet brings viruses straight to the e-mail box. ff an e-mail with attachment(附件) comes from an unknown sender, or unexpectedly from a known" sender, it should not be opened. On receiving an unexpected attachment from a friend, experts suggest a telephone call to make sure of the mail" s source before opening. If you open the mail without any consideration, you will be easily attacked by the hackers.

单选题The purpose of the "special instruments" mentioned in the third paragraph_________.

单选题The more friends that come, ______ the party will be.

单选题The writer came to London from ______.