Many students get ill easily.They have to go to hospital and may miss（错过） a lot of classes.What can we do to keep healthy？Here are some tips：
    Healthy food.You should eat less fast food but more vegetables and fruit.You'd better drink 500 ml milk every day.Remember to eat breakfast.
    Enough exercise. 锻炼是很重要的。 It makes you more athletic.You can play some sports after class or on weekends.
Global Recommendations（全球建议） on the Health Benefits of Physical Activity
    Physical activity can not only develop a healthy cardiovascular system（心血管系统） but also maintain a healthy weight.Teens who are physically active are more likely to accept other healthy behaviors and perform better in school.
-by WHO Happy smiles.Smiling is a good way to make you healthy.Try to find things that can make you laugh.Remember that smiling is the best medicine to cure（治愈） your illness（疾病）.
Good rest.If you want to get a good grade，you must have a good rest.As a famous saying goes， "Early to bed and early to rise makes a man healthy，wealthy（富有的） and wise（聪明的）."

（1）How much milk should we drink every day？

500 ml .

500 ml .

（2）Please translate the underlined sentence into English.

Doing exercise is very important./It's very important to do exercise.

Doing exercise is very important./It's very important to do exercise.

（3）When can we play sports？

We can play sports after class or on weekends.

We can play sports after class or on weekends.

（4）Why are the global recommendations by WHO mentioned？

To show that enough exercise is important.

To show that enough exercise is important.

（5）Why does the writer suggest that people should laugh more often？

Because smiling is a good way to make you healthy./Because smiling is the best medicine to cure your illness.

Because smiling is a good way to make you healthy./Because smiling is the best medicine to cure your illness.

（6）Please translate the underlined sentence into Chinese.

早睡早起使人健康、富有且聪明。

早睡早起使人健康、富有且聪明。