[解析]
(1)A.细节理解题。根据文章第一段Nobody needs reminding that exercise is good for our health,but we may need reminding that it needs to be done in the right way.没有人需要提醒锻炼对我们的健康有好处,但是我们可能需要提醒锻炼的方式是正确的。可知作者写文章给我们一些关于练习的提醒。故选A。
(2)B.词义猜测题。根据文章第二段 If we go into such sport cold,it can shock our muscles,hearts,lungs,and other organs and cause severe pain or in some cases,even death.如果我们进入这样的运动冷,它会震惊我们的肌肉,心脏,肺,和其他器官,并造成剧烈的疼痛或在某些情况下,甚至死亡。A.Having trained a lot训练了很多;B.Without any preparation没有任何准备;C.Having a low temperature温度低;D.In an unfriendly way以不友好的方式。可知,"cold"意为未作任何准备。故选B。
(3)D.细节理解题。根据文章第三段Some universities and high schools have cut long distance races (i.e.3.000 m,5,000 m) from their campus sports games,partly because of the supposed danger and partly because they say fewer people are entering such events.一些大学和高中已经从校园体育比赛中削减了长跑比赛(即3,000米,5,000米),部分是因为所谓的危险,部分是因为他们说参加这类比赛的人越来越少.可知有些大学和学校取消长跑比赛因为他们担心在这样的比赛中有危险。故选D。
(4)A.推理判断题。根据文章最后一段People participating in such competitions should realize that a reasonable amount of training is required beforehand and having a medical check is wise,especially for a marathon.People shouldn't be forced to participate in events that push them past their limits,especially if they haven't warmed﹣up completely.参加这类比赛的人应该意识到事先需要进行合理的训练,进行体检是明智的,特别是对于马拉松比赛,人们不应该被迫参加那些将他们推过极限的活动,特别是如果他们还没有完全热身的话。可知在跑马拉松之前作者建议我们进行体检和热身练习。故选A。