1.Health is important.
2.Doing exercise can make us live over 99 years old.
3.I think having a lot of healthy food and doing exercise can keep you healthy.
4.Do you know how to keep healthy?
5.An apple a day keeps the doctor away.
6.We must keep healthy.
7.The best way to keep healthy is to have a lot of fruit and vegetables every day.
8.You must have plenty of fruit and vegetables.
9.It can make us strong and happy.
10.Keeping healthy can make us live longer.
11.We must eat few junk food.
12.We need to do many exercises.谢谢，为什么第3和12题跟上面的答案不一样1 还可以为keeping healthy is important.12 还可以是we need many exercises.3.还可以是I think a lot of healthy food and doing exercise can keep you healthy.谢谢采纳，