【题目】 Participation in sports benefits health, encourages self-discipline, and develops character and teamwork. The positive effects of sport are well-known: improved body system and muscular fitness lower risk of obesity and depression, and an increased life quality. 【1】
Here is one-sports addiction. It may sound contradictory, because we usually reserve the word “addiction” for things that are bad for us, such as drug abuse or alcoholism.【2】Caused by the release of “happiness hormones(荷尔蒙)” after exercising, you can feel really “high” and be hooked on this feeling, which, like those produced by illegal drugs and alcohol, can be habit-forming.
Sports addiction is not taken seriously by everyone, though.【3】Sports addiction is, however, real and harmful.
Sport addicts share many symptoms with other sorts of addicts.【4】This is because they don't give them the chance to recover from working out. They have been so addicted to sports that they don't take time to recover from injuries. Chances of heart attacks and passing out increase, so sports addicts can put themselves at serious risk of harm.
【5】They become dependent on training for feeling good, and life away from training becomes dull. They can also develop tolerance to the “high”, and so need more and more exercise to get the same result. And when not exercising, they experience withdrawal effects, depression and anxiety.
A.They harm their bodies.
B.It may lead to physical injuries.
C.“There're worse things to be addicted to,” some people disagree.
D.Meanwhile, sport addicts may suffer withdrawal symptoms as well.
E.But there really is a sense in which you can become addicted to exercise.
F.Apart from physical damage, sport addicts suffer psychological damage too.
G.Based on all this good news, one might wonder whether there is any drawback.
【答案】
【1】G
【2】E
【3】C
【4】A
【5】F
【解析】
本文是说明文。主要介绍了沉迷体育锻炼的危害。
【1】本题位于第一段的段末，通常有承上启下的作用。根据上文讲述的参加体育锻炼的好处和下文的不好，所以推测这句应该是：基于以上好消息，人们可能会想是否有缺点。故选G。
【2】根据上一句列举的吸毒、酗酒这些不好的事情，以及下文说到运动后真的会感觉很兴奋，就像吸毒和喝酒一样会让人上瘾。所以，这里应该是说：锻炼真的会让一个人有沉迷的感觉。故选E。
【3】根据前一句说：有些人并不把沉迷锻炼当成一回事，下文说：但是沉迷锻炼真的存在且有害，所以，这里应该是，不把沉迷锻炼当成一回事的人的表现：有些人不同意:“还有更糟糕的事情让人上瘾”。故选C。
【4】根据前一句说：沉迷锻炼会有一些症状。后一句：这是因为他们没有给他们从锻炼中恢复的机会。后一句解释了沉迷锻炼造成危害的原因。以及后面的heart attacks，因此本句应该是陈述“他们对身体有害。”故选A。
【5】本句位于段首，有总起的作用。根据前一段说的是沉迷锻炼会伤害身体，后文又有depression and anxiety这些描述心理的词，所以，这里应该是：沉迷锻炼除了对生理有害，对心理也有害。故选F。
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