перевидите 40 см² в обичные см

White sentences with should or shouldn't.Make sure they're all good advice. 

1) Everyone/eat lots of fruit and vegetables.

2) He/be so pessimistic . He /be more positive.

3) She/eat all that fast food.It isn't healthy .

4) They /get married now.They're too young .

5) You /smoke.It's very bad for you.