ПЖжжж помогите ДАМ 30 БАЛЛОВ!!!!

1 - My brother has to take his medicine after dinner.
2 - I haven't meet my friend at the gym. He is sick at home.
3 - You have eat lots of fruit and vegetables when you are ill.
4 - Kairat is feeling better; he hasn't go to the doctor.
5 - I have cook dinner today. My mom asked me.