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  3. Doctors in Britain are warning of an obesity(肥胖症)time bomb, when children who are already overweight grow up. So, what should we

Doctors in Britain are warning of an obesity(肥胖症)time bomb, when children who are already overweight grow up. So, what should we

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问题     Doctors in Britain are warning of an obesity(肥胖症)time bomb, when children who are already overweight grow up. So, what should we do? Exercise more? Eat less? Or both? The government feels it has to【B1】______this expanding problem.
    The cheerful Mr. Pickwick, the hero of the novel by Charles Dickens, is seen in 【B2】______ as someone who is plump—and happy. In 18th century paintings beauty 【B3】______ rounded bodies and soft curves. But nowadays being overweight is seen as 【B4】______neither a cheerful character nor beauty but an【B5】______ risk of heart disease, stroke and diabetes(糖尿病).
    So what do you do? Diet? Not, according to England’s chief medical officer, Sir Liam Donaldson. He says that physical activity is the key for【B6】______ the risks of obesity, cancer and heart disease. And the Health Secretary John Reid even said that being inactive is as serious a risk factor in heart disease as smoking.
    So, having bought some cross trainers, how much exercise should you do? According to Sir Liam Donaldson, at least 30 minutes of【B7】______activity five days a week. Is going to the gym the answer?【B8】______ for those who find treadmills tedious, the Health Development Agency believes that physical activity that【B9】______people’s lives may be more effective. They suggest taking the stairs rather than the lift, walking up escalators, playing active games with your children, dancing or gardening. And according to a sports 【B10】______Professor Biddle, gyms "are not making the nation fit", and may even cause harm.
【B8】
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答案Luckily
解析 此空位于句首，本句不缺任何句子成分，需要填入虚词。Luckily意为“幸运地”，注意首字母要大写。
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