Что там необходимо делать!? я не разумею! помогите упрашиваю прошу,там необходимо

1. I eat one or two bars of chocolate per a week
2.I drink about one litre of milk per a week
3.I don't take any teaspoons of sugar in my tea
4.Yes, I add a pinch of salt to my salad
5. I usually put one slice of cheese in my sandwich
6.I usually buy one or two loaves of brown bread a week