Ex 1: rewrite the sentence with "ought to"or "ought not to":
1.her room is very dirty(clean it every day)
2.I play tennis badly(practice tennis more regularly)
3.my father has a sore throat (not smoke so much)
4.Nam feels very tired (go to bed early )
5.he had an accident last week (not drive so fast)
6.I catch flu (stay in bed)