1    (现如今) people pay more and more attention to their own health in daily life.As students,we should know more about how to keep fit.

Firstly, it is necessary for us to keep a balanced diet, such as     2    (多吃富含纤维和维生素的水果和蔬菜) (含有定语从句) , rather than having food containing too much fat or sugar.

Secondly, doing sports     3    (将会影响) on our bodies. Many researches show people     4    (有规律的锻炼) can have a stronger body than those who do not.

Thirdly,     5     (养成好的生活习惯) is beneficial to us .Just as a saying goes, “Early to bed and early to     6    .” (使一个人健康，富有，睿智) Moreover, keeping a positive attitude towards life is     7    . (很重要) (含有of)

In a word,     8     (只有用这种方式，我们才能保持健康。)(倒装句)