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阅读下面这篇短文，短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为规定段每段选择1个正确的小标题；(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。1. Psychologist George Spilich and colleagues at Washington College in Chestertown, Maryland, decided to find out whether, as many smoker say, smoking helps them "think and concentrate." Spilich put young non-smokers, active smokers and smokers deprived(被剥夺)of cigarettes through a series of tests. 2. In the first test, each subject(试验对象)sat before a computer screen and pressed a key as soon as he or she recognized a target letter among a grouping of 96. In this simple test, smokers, deprived smokers and non-smokers performed equally well. 3. The next test was more complex, requiring all to see sequences of 20 identical letters and respond the instant one of the letters transformed into a different one. Nonsmokers were faster, but under the stimulation of nicotine(尼古丁), active smokers were faster than deprived smokers. 4. In the third test of short-term memory, non-smokers made the fewest errors, but deprived smokers committed fewer errors than active smokers. 5. The fourth test required people to read a passage, then answer questions about it, Non-smokers remembered 19 percent more of the most important information than active smokers, and deprived smokers bested those who had smoked a cigarette just before testing. Active smokers tended not only to have poorer memories but also had trouble separating important information from insignificant details. 6. "As our tests became more complex." Sums up Spilich, "non--smokers performed better than smokers by wider and wider margins." He predicts, "smokers might perform adequately at many jobs--until they got complicated. A smoking airline pilot could fly adequately if no problems arose, but if something went wrong, smoking might damage his mental capacity." Para 2 ______.
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阅读下面的短文，文中有15处空白，每处空白给出4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 Smoking is considered dangerous to the health. Our tobacco--seller, Mr. Johnson, therefore, always asks his customers, if they are very young, whom the cigarettes are bought (51) . One day, a little girl whom he had never seen before walked (52) into his shop and demanded twenty cigarettes. She had the (53) amount of money in her hand and seemed very sure of herself. Mr. Johnson was so (54) by her confident manner that he (55) to ask his usual question. (56) , he asked her what kind of cigarettes she wanted. The girl replied (57) and handed him the money. While he was giving her the change, Mr. Johnson said laughingly that (58) she was so young she should (59) the packet in her pocket in case a policeman saw it. (60) , the little girl did not seem to find this very funny. Without (61) smiling she took the (62) and walked towards the door. Suddenly she stopped, turned (63) , and looked steadily at Mr. Johnson. There was a moment of silence and the tobacco-seller (64) what was going to say. All at once, in a clear, (65) voice, the girl declared, " My dad is a policeman," and with that she walked quickly out of the shop.
第三篇 Priscilla Ouchida’s "energy-efficient" house turned out to be a horrible dream. When she and her engineer husband married a few years ago, they built a ＄ 100,000, three--bedroom home in California. Tightly sealed to prevent air leaks, the house was equipped with small double-parted (双层玻璃) windows and several other energy-saving features. Problems began as soon as the couple moved in, however. Priscilla’s eyes burned. Her throat was constantly dry. She suffered from headaches and could hardly sleep. It was as though she had suddenly developed a strange illness. Experts finally traced the cause of her illness. The level of formaldehyde(甲醛)gas in her kitchen was twice the maximum allowed by federal standards for chemical workers. The source of the gas Her new kitchen cabinets and wall-to-wall carpeting. The Ouchidas are victims of indoor air pollution, which is not given sufficient attention partly because of the nation’s drive to save energy. The problem itself isn’t new. "The indoor environment was dirty long before energy conservation came along." Says Moschandreas, a pollution scientist at Geomet Technologies in Maryland. "Energy con- servation has tended to accentuate the situation in some cases." The problem appears to be more troublesome in newly constructed homes rather than old ones. Back in the days when energy was cheap, home builders didn’t worry much about unsealed cracks. Because of such leaks, the air in an average home was replaced by fresh outdoor air about once an hour. As a result, pollutants generated in most households seldom built up to dangerous levels. The word "accentuate" (Para. 3) most probably means" ______".
阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 Before any period of exercise it is well worth spending two or three minutes warming up with a series of simple stretching exercises. This not only helps your joints(关节) to move easily but also prepares all your muscle groups for more energetic activity. It is rather like a cat stretching itself before it springs into action. Here are four movements to do in an easy and unhurried way, gently stretching each action without forcing it. Repeat each movement ten times, breathing normally throughout. Ⅰ. Standing with your feet apart, push both arms out straight in front of you, fingertips touching. Raise them above your head, then down to the sides pushing each arm backwards at the same time. Ⅱ. Standing with your feet apart, and hands on hips(臀部). Tip your head back and look straight up to the ceiling. Roll your head round slowly to face the right, then the floor, then the left, and finally up at the ceiling again. Repeat in the other direction. Ⅲ. Standing with your feet apart and hands on your sides, lean first to the right and then to the left, sliding the hand down the side of the leg. Ⅳ. Standing feet apart and arms out straight in front, with your eyes fixed on your right hands, swing your right arm round to the right, keeping it straight, as far as it will go. Return it to the front and repeat with the left arm. Without warming up, you’ll easily get hart when doing exercise.
阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 Before any period of exercise it is well worth spending two or three minutes warming up with a series of simple stretching exercises. This not only helps your joints(关节) to move easily but also prepares all your muscle groups for more energetic activity. It is rather like a cat stretching itself before it springs into action. Here are four movements to do in an easy and unhurried way, gently stretching each action without forcing it. Repeat each movement ten times, breathing normally throughout. Ⅰ. Standing with your feet apart, push both arms out straight in front of you, fingertips touching. Raise them above your head, then down to the sides pushing each arm backwards at the same time. Ⅱ. Standing with your feet apart, and hands on hips(臀部). Tip your head back and look straight up to the ceiling. Roll your head round slowly to face the right, then the floor, then the left, and finally up at the ceiling again. Repeat in the other direction. Ⅲ. Standing with your feet apart and hands on your sides, lean first to the right and then to the left, sliding the hand down the side of the leg. Ⅳ. Standing feet apart and arms out straight in front, with your eyes fixed on your right hands, swing your right arm round to the right, keeping it straight, as far as it will go. Return it to the front and repeat with the left arm. Before exercise. You’d better do something to warm up first.
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