任务型阅读：读下面短文，完成后面的问题
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. Doing exercise is important. It makes you more athletic. You can play some sports after class or on weekends.
Happy smiles. Smile is a good way to make you healthy. Try to find things that can make you laugh. Remember that smile is the best medicine to cure（治疗）your illness.
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）.”
根据短文内容，完成下列任务。
任务一：将划线句子翻译成汉语。
小题1:
任务二：完成下列句子。每空词数不限。
小题2:If you get ill, you have to and may .
小题3:You can play sports or .
任务三：回答下列问题。
小题4:How much milk should we drink every day?
小题5:Why is smile important?