1 You have to eat a healthy breakfast every morning.
2 You must be careful with what you eat.
3 We have to exercise every day for at least 30 minutes.
4 You must go to the doctor when you have a cold.
1) done
2)couldn't
3)changed
4)felt
5)was
6)didn't know
From
with
on
by
(Тут должно быть at но может быть и into)
for
on
from
with