Using a mobile phone for more than 10 years increases the risk of getting brain cancer, according to the most comprehensive study of the risks yet published. The study—which contradicts official statements that there is no danger of getting the disease—found that people who have had the phones for a decade or more are twice as likely to get a malignant tumour( 恶性肿瘤 ) on the side of the brain where they hold the handset. The scientists who conducted the research say using a mobile for just an hour every working day during that period is enough to increase the risk—and that the international standard used to protect users from the radiation emitted is “not safe” and “needs to be revised” . They concluded that “caution is needed in the use of mobile phones” and believe children, who are especially vulnerable( 脆弱的 ), should be discouraged from using them at all. Britain's largest investigation into the health risks of the technology, the Mobile Telecommunications and Health Research(MTHR) programme—funded by “government and industry sources”—reported that “mobile phones have not been found to be associated with any biological or harmful health effects” . But its chairman, Professor Lawrie Challis, admitted that only a small proportion of the research had covered people who had used the phones for more than a decade. He warned, “We cannot rule out the possibility at this stage that cancer could appear in a few years' time.” The new study—headed by two Swedes, Professor Lennart Hardell of the University Hospital in Orebro and Professor Kjell Hansson Mild of Umea University, who also serves on the MTHR programme's management committee—goes some way to meeting the deficiency( 缺陷 ) . The scientists pulled together the results of the 11 studies that have so far investigated the occurrence of tumours in people who have used phones for more than a decade, using research in Sweden, Denmark, Finland, Japan, Germany, the United States and Britain. They found almost all had discovered an increased risk, especially on the side of the head where people listened to their handsets. Five of the six studies of malignant tumour found an increased risk, and only one did not still found an increase in benign( 良性的 ) tumour. Four of the five studies that looked at acoustic neuromas( 听神经肿瘤 ) found them. The exception was based on only two cases of the disease, but still found that longterm users had larger tumours than other people. The scientists assembled the findings of all the studies to analyse them collectively. This revealed that people who have used their phones for a decade or more are 20 percent more likely to contract acoustic neuromas, and 30 percent more likely to get malignant gliomas. The risk is even greater on the side of the head the handset is used: longterm users were twice as likely to get the gliomas( 胶质瘤 ), and two and a half times more likely to get the acoustic neuromas there than other people. The scientists conclude, “Results from present studies on use of mobile phones for more than 10 years give a consistent pattern of an increased risk for acoustic neuroma and glioma.” They add that “an increased risk for other types of brain tumours cannot be ruled out”. 1. We can infer from the passage that ________. A. there is no link between malignant tumour and mobile phones B. all brain cancers result from the long exposure to the mobile radiation C. the present standard by authorities on mobile radiation is controversial D. the risk of brain cancer caused by mobile phones remains to unclear 2. The new study headed by the two Swedes ________. A. corrected the deficiency in the MTHR programme's management B. came to a conclusion similar to that of MTHR's investigation C. ruled out the possibility that longtime users could get brain cancer D. made some improvements by expanding the investigation samples 3. The passage tries to tell us that ________. A. using mobile phones is dangerous to people's health B. children should be forbidden to use mobile phones C. people using mobile phones an hour every working day will get brain cancer D. the more people use mobile phones, the more likely they are to get brain cancer 4. The underlined word “contract” in Paragraph 10 probably means “________”. A. be infected with B. be associated with C. be faced with D. be covered with 5. The best title of the passage is ________. A. The Causes of Brain Cancer B. The Hidden Danger of Mobile Phones C. The Research of Brain Cancer D. The Negative Effects of Mobile Phones