题目内容：

    Being fit (强健的) means a person cats well, gets a lot of exercise, and has a healthy weight. If you’re fit, your body works well and feels good. Here are five rules to live by, if you’re a kid who wants to be fit.

Eat Different Kinds of Food

You may have a favorite food, but it is best to cat different kinds of food. If you do this, you’re more likely to get what your body needs. Taste new foods and old ones you haven’t tried for a while. Some foods, such as green vegetables, may taste better, the older you get. Try two fruits and three vegetables a day.

Drink Water and Milk

When you’re really thirsty, water is what you need. It’s also OK to drink some fruit juice once in a while. But not too much. And there’s a reason why you need to drink some milk. Kids need milk to build strong bones (骨骼). If you’re nine or older, drink three cups of milk every day.

Listen to Your Body

What does it feel like to be full? When you’re eating, notice how your body feels and when your stomach (胃) feels comfortably full. Sometimes, people eat too much because they don’t notice when they need to stop eating. Eating too much can make you feel uncomfortable.

Limit (限定) Screen Time

What’s screen time? It’s the time you spend watching TV or playing games, and using a smart phone or computer. Try to spend no more than two hours a day on screen time.

Be Active

Find ways to be active every day. You might even write down a list of fun things to do, so you can use it when your mum or dad says it’s time to stop watching TV or playing computer games!

Tell your parents about the five rules. If you’re a fit kid, why shouldn’t you have a fit mum and a fit dad?

1.How many rules do we know from the passage?

2.What can help kids to build strong bones?

3.Why should we write down a list of fun things to do?