1. what is the most popular way of keeping healthy in your country?
解析：这是一道流行类话题，又出现了in your country, 我们还是要分情况来回答，按照年龄组更好说一些。保持健康不外乎合理饮食，规律运动，早睡早起和愉快心情这几个方面。年轻人喜欢活泼有趣的体育运动,例如打篮球，有氧运动之类的，然而中老年人更喜欢安静舒缓一些的运动，另外还注意食疗，买保健品和仪器之类的。
首先总起：Well, it depends on different age groups.
先说年轻人：For young people, they are keener on some energetic and exciting ways, like playing basketball and going to the gym to build up muscles and stay in good shape.
再对比老年人：Whereas for the elderly, they might choose from a wider range of methods to keep healthy, for example, they pay much attention on well-rounded diet or recipe, or buy a number of health care products, like vitamin pills, massage equipment and some stuff like that.
2.How has people’s way of exercising changed?
先说过去：Well, people used to exercise in some traditional ways, like taking some outdoor activities in a park or doing some manual housework at weekends.
再对比现在：yet now, people have a wider range of selections such as going to a gym to build up muscles, learning dances or doing yoga in a training center, swimming all year round in a swimming pool, or by doing some extreme sports, like rollerblading, skateboarding, just to name a few, mainly because they could afford the expenses and enjoy more leisure time.
3.How could government promote a healthy lifestyle?
解析：观点类问题，问具体的做法，一般至少要给到两个措施，我们常见的思路一个是广泛宣传提高意识，一个是增加一些设施以及人员，还有可以颁布相关政策法规来限制。注意使用besides, more importantly这样的逻辑关系连接词，尽量少用second, third之类的序数词。
总起：Well, as far as I am concerned, I believe that government can do lot of things to encourage the public to live a healthier life.
1提升意识：first of all, they should promote the idea of a healthy life in a variety of ways, such as making some TV programs to show healthier diet and the importance as well as the methods of regular exercise.
2增加设施：Besides, governments also needs to establish more well-equipped sports facilities for the public, including basketball courts, parks, gyms and other leisure facilities. Meanwhile, these facilities need to be affordable so as to encourage more people to take advantage of them.
3相关政策：More importantly, they should put on more restrictions on the consumption of tobacco and alcohol, or prohibit any advertising campaigns for those products.