(2019·安徽省示范高中模拟)

Proper exercise is beneficial to our health.As the experts say, swimming is an excellent way to work your entire body.An hour of swimming 1.________(burn) almost as many calories as running.There are a host of benefits you may gain from swimming 2.________(regular)．

One of 3.________ biggest benefits of swimming is that it truly works well from head to toe.It can not only increase your heart rate without 4.________(stress) your body, but also build up your muscles and 5.________(strong)．Besides, swimming makes your heart and lung strong.It is so good for you that researchers say it may even reduce your risk of death.6.________(compare) with inactive people, 7.________(swim) have about half the risk of death.Some other studies have shown that swimming may help lower blood pressure and control blood sugar.

The number of persons 8.________ experience some level of insomnia(失眠症) is increasing, so this is excellent news—the researchers conclude that swimming is a potentially powerful way to relieve stress quickly and promote deeper sleep.

Swimming is safe for most people.As with any workout, there are certain risks associated with swimming.If you 9.________(injure) or have certain medical conditions, be sure to check with your doctor before swimming.10.________ general, it's a good idea to check with your doctor whenever you start a new exercise program.

【语篇解读】　本文是一篇说明文。游泳运动和跑步燃烧的卡路里相当，经常游泳的人获益良多，如可以提高心率，增强肌肉力量和心肺功能。

解析：考查时态和主谓一致。句意：游泳一小时几乎和跑步一小时燃烧的卡路里一样多。根据句意可知，该句陈述的是一般事实，故用一般现在时；且该句主语为“An hour of swimming”，因此谓语动词用第三人称单数形式，故填burns。