单选题Little Tom was reluctant to tell the schoolmaster ______ he had done the day before.A. thatB. howC. whereD. what

单选题— I will be right back in an hour. Will you wait for me? — I'm afraid not. He probably have gone to a meeting ______ then.[A] by[B] since[C] from[D] till

单选题Young people and older people do not always agree. They some- times have different ideas about living, working and playing. But in one special programme in New York State, adults and teenagers live together in a friendly way. Each summer 200 teenagers and 50 adults live together for eight weeks as members of a special work group. Everyone works several hours each day. They do so not just to keep busy but to find meaning and enjoyment in work. Some teenagers work in the woods or on the farms near the village. Some learn to make things like tables and chairs and to build houses. The adults teach them these skills. There are several free hours each day. Weekends are free, too. During the free hours some of the teenagers learn photo-taking or painting. Others sit around and talk or sing. Each teenager chooses his own way to spend his free time. When people live together, rules are necessary. In this programme the teenagers and the adults make the rules together. If some- one breaks a rule, the problem goes before the whole group. They talk about it and ask, "Why did it happen? What should we do about it?" One of the teenagers has this to say about the experience: "You stop thinking only about yourself. You learn how to think about the group./

单选题You must make ______ clear that no harm comes to her.[A] that[B] it[C] this[D] what

单选题Her ______ scream made us all feel ______. A.exciting; exciting B.exciting; excited C.excited; exciting D.excited; excited

单选题On Oct. 12, 1989, some Chinese scientists were working at the computers to look for the information they needed. Suddenly they saw a lot of very bright spots crossing the computer's screens. At the same moment the computers were working much slower. To find out what was happening, they stopped their work to check some parts of the computers. To their horror, they found out that most of their stored information was got rid of by computer viruses (病毒). Obviously all these computers had been infected (传染) by computer viruses. It is said that the computer viruses were made by a group of young men fond of playing tricks. They all have excellent education. They created the viruses just to show their intelligence. This kind of computer viruses is named Jerusalem (耶路撒冷) Viruses. These viruses can stay in computers for a long time. When the time comes they will attack the computers by lowering the functions, damaging normal programs or even getting rid of all the information. We now come to know that Jerusalem Viruses often attack computers on Fridays and that they are spreading to a lot of computers. Among the countries that suffered computer viruses last year are Britain, Australia, Switzerland and the US. But till now, how to get rid of the terrible viruses remains a problem.

单选题I have two children. One is a teacher, ______ is a doctor. [A] another [B] the other [C] other

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单选题In Disneyland, every year, some 800 000 plants are replaced because Disney refused to ______ signs asking his "guests" not to step on them.[A] take down[B] call for[C] put up[D] set up

单选题Which of the following orders is right? a. He walked back to Western Germany. b. He was wounded when the war was coming to the end. c. The hospital was destroyed by bombs. d. He came back to his family house. e. He was sent to hospital. f. His unit of German army didn't exist any longer.

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单选题I think he is going to deal with the problem ______ day.

单选题I told the driver that he had knocked two people ______ their bicycles and had nearly caused a had accident.[A] into[B] off[C] on[D] out of

单选题 阅读下列短文，从每题所给的四个选项([A]、[B]、[C]和[D])中选出最佳选项。{{B}}A{{/B}} {{B}} Tobacco{{/B}} You most likely know that tobacco is a plant. It has large leaves that have been smoked in many forms for at least 2 000 years. But do you know that: Before the twentieth century, not many people died from using tobacco because there wasn't much tobacco being used. Cigarettes had to be rolled by hand. A person who was really fast could roll about four cigarettes a minute, or around 2 000 a day. In 1884 the cigarette manufacturing machine was invented that could produce 120 000 cigarettes a day. Soon the number being sold rose to one billion a year. As a result of advertising and efficient machines, the tobacco business continued to grow. Today about 840 packs of cigarettes are sold every second in the US. That's more than one million every hour! Imagine that! Blink you eyes and 840 packs are s01d. Blink again -- another 840 packs! As the number of cigarette sales increased, so did the number of deaths caused by cigarettes. Today one out of every five people who die in the US dies because of smoking. Smoking tobacco is responsible for more deaths than cocaine, heroin, alcohol, fire, automobile accidents, homicides, suicides, and AIDS combined. That amounts to about 430 000 people who die needlessly every year, 1 200 people who die every day because of their addiction to cigarettes. It's like having several completely full jumbo jets crash every day, killing all aboard!{{B}} Who in the USA Smokes{{/B}} Cigarette smoking is a widespread habit in the United States today. About forty-three percent of the adult men and thirty-one percent of the adult women smoke regularly. It is quite encouraging to note,however,that millions of people have given up the smoking habit. Seventy-five percent of the male population and forty-six percent of the female population have smoked cigarettes at some time during their lives, but twentysix percent of these men and eleven percent of these women have stopped smoking. The number of persons who have given up smoking is increasing. Men as a group smoke more than women. Among both men and women the age group with the highest proportion of smokers is the age group 24～44. Income, education and occupation play a part in determining a person's smoking habits. City people smoke more than people living on farms. Well-educated men with high incomes arc less likely to smoke cigarettes than men with fewer years of schooling and lower incomes. On the other hand, if a well-educated man with a higher income smokes at all, he is likely to smoke more packs of cigarettes every day. The situation is somewhat different for women. There are slightly more smokers among women with higher family incomes and higher education than among the lower income and lower educational groups. These more highly educated women tend to smoke more heavily. Among teenagers the picture is similar. There are fewer teenage smokers from upper-income, well-edu-cated families, and from families living in farm areas. High school students who are preparing for college are less likely to smoke than those who do not plan to continue their education after high school. Children are most likely to start smoking if one or both of their parents smoke.

单选题—Are you still there?—Yes, the storm prevented us ______ yesterday.

单选题"And the word 'green' today can keep food prices going up. "This sentence suggests that consumers today are ______.

单选题The new plan exists only______paper, and it won't work______practice.[A] on... in[B] on... on[C] in... in[D] in... on

单选题Why did the man borrow the woman’s computer last time?

单选题一What did Mr.Jones do before he came to this company?一He __________ a city bus for over twenty-five years.

单选题He has made another discovery, ______ of great importance to science. A. which I think it is B. of which I think it is C. which I think is D. I think which is