Помогите 3,4 плис 10и20 балов

1 ..., isn't it? 2 ..., don't we? 3 ..., don't they? 4 ..., is it? We should eat healthy food. We should do sports. We should drink more water. We musn't eat junk food. We musn't sleep all day. We musn't sit at the computer for a long time.

1 isn t it 2 don' t we 3 don't we   4 is it 1 you should eat a healthy food 2we should do exercises 3 we should drink about 1 or 2 bottle water in  one day 1 we mustn t eat fast food 2 we mustn t smoke 3 we mustn t drink alcohol