The doctor asks us __________．

A．keep healthy         B．to keep healthy              C．to keep health            D．keep health

“Eat your breakfast. It’s the most important meal of the day!” Why are parents always saying that?
Well, a person is like a car. After a long night of sleeping, there is no fuel in your fuel tank(燃料箱). Breakfast is like the fuel. It makes you work or walk on the road.
What should you eat? Any breakfast is better than no breakfast, but try not to have hamburgers or dessert(甜点) all the time. They don’t have the necessary nutrients(必需的营养素). And if you have a hamburger for breakfast, you won’t feel full for long.
Try to eat all kinds of foods like grains, fruit, vegetables and drink some milk. Oh, try to eat more apples because an apple a day can help to keep the doctor away.
【小题1】 From the passage, we know people should try not to ______ all the time if they want to keep healthy.