7. It is believed that children of two or three years old are able to learn any language if they are ______ it.
A.involved in
B.indulged in
C.disposed to
D.exposed to
A B C D
D
[解析] 题干：人们认为，两三岁的孩子能够学习他们所接触到的任何语言。involve sb. in sth. 意指“使某人参与某活动或陷入某情况，表明某人与(某罪行)有关联”；indulge in sth. 指“让自己尽情享受某事物”；dispose sb. to sth. 指“使某人愿意做某事”；expose sb. to sth. 指“显露或暴露某人于某事物，使某人面临某事物或接触某事物”。所以，正确答案为D。
8. In the face of unexpected difficulties, he demonstrated a talent for quick, ______ action.
1. In general, lasers operate by creating an intense amount of light and energy which is then converted into heat and used to control bleeding or destroy diseased tissue.
8. We have a responsibility to ensure our nation's continued prosperity and the most sensible way to do this is by investment in basic scientific research.
10. Differences among believers are common; however, it was the pressure of religious persecution that exacerbated their conflicts and created the split of the union.
Part Ⅱ Cloze A study has shown that fitness is the key 1 long life, irrespective of body shape or even smoking habits. Researchers discovered that people 2 exercise live longer than those do not, 3 they are overweight and smoke. The study found that the least fit of the 6000 middle-aged men in the study were five times 4 to die within six years of the start of the research than the 5 . This was true whether or not the men had heart problems, smoked or were overweight. Scientists concluded that it was better to be fat and 6 than skinny and sedentary(久坐的). Dr. Ken Cooper, a fitness expert, said, "You are better off smoking a packet of cigarettes a day and 7 regularly than being a non-smoker and sedentary." Although he adds, "But don't misunderstand me. I am not endorsing smoking. I am trying to tell you how dangerous it is to be sedentary." 8 , the study appears to fly in the face of research last year which concluded that more than 30000 people die prematurely every year in Britain from illnesses caused by being overweight. The British Government is putting pressure on manufacturers 9 high levels of sugar in food and to restrict the hard-sell of junk food to children in order to improve the nation's health. But the new study suggests the Government 10 more people to exercise.
For years, scientists have been warning us that the radiation from mobile phones is detrimental to our health, without actually having any evidence to back these 11 up. However research now suggests that mobile phone radiation has at least one positive side effect: it can help prevent Alzheimer's, 12 in the mice that acted as test subjects. It's been suspected, though never proven, that heavy use of mobile phone is bad for your health. It's thought that walking around with a cellphone permanently attached to the side of your head is almost sure to be 13 your brain. And that may well be true, but I'd rather wait until it's proven before giving up that part of my daily life. But what has now been proven, in a very perfunctory manner, is that mobile phone radiation can have an effect on your brain. 14 in this case it was a positive rather than negative effect. According to BBC News, the Florida Alzheimer Disease Research Center conducted a study on 96 mice to see if the radiation given off by mobile phone could affect the onset of Alzheimer's. Some of the mice were "genetically altered to develop beta-amyloid plagues in their brains" 15 they aged. These are a marker of Alzheimer's. All 96 mice were then "exposed to the lector-magnetic 16 generated by a standard phone for two one-hour periods each day for seven to nine months." The lucky things. 17 , the experiment showed that the mice altered to be predisposed to dementia were protected from the disease if exposed before the onset of the illness. Their cognitive abilities were so unimpaired as to be virtually 18 to the mice not genetically altered in any way. Unfortunately, although the results are positive, the scientists don't actually know why exposed to mobile phone radiation has this effect. But it's hoped that further study and testing could result in a non-invasive 19 for preventing and treating Alzheimer's disease. Autopsies carried out on the mice also concluded no ill-effects of their exposure to the radiation. However the fact that the radiation prevented Alzheimer's means mobile phones 20 out brains and bodies in ways not yet explored. And it's sure there are negatives as well as this one positive.
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