阅读下面的短文，从所给的A～F六个选项中，选出正确的答案填空，使短文通顺，内容完整，其中选项中有一项是多余的。

Five Rules to Have a Healthy Life

Thanks to better health care, many people are living healthier, longer lives. Someone who is born today can expect to live 25 years longer than someone who was born in the 19th century. It’s even thought that in the future more and more people will celebrate their hundredth birthday. 【小题1】

Get off the sofa

Sure, it’s comfortable to sit on the sofa and watch TV. But experts say you should get off the sofa. 【小题2】 In the past, people’s jobs required more physical effort. When farmers were working in the fields, they were keeping fit at the same time. Think about it: do you get the same amount of exercise today as they did in the past?

Eat healthy food

It’s important to eat food that is fresh and natural, for example, fruit and vegetables. 【小题3】 You should only have it once in a while. Eating too much of the wrong food will harm your health. The bad diet means you’ll put on weight, one of the fastest ways to an unhealthy life.

Rest while you can

When we were babies, we slept for much of the day. Teenagers don’t need as much sleep as babies, 【小题4】 On weekends, you’ve got more time, so use it not just for your friends, but for rest, too.

Don’t worry. Be happy

Many people believe that happiness is important for our general health. Sometimes it is not easy to be a teenager because of the difficulties of school, exams or friendships. If you are worried about something, talk to your parents or teachers.

Say “no” to smoking

Yes, you knew I was going to say this! But it’s so important. 【小题5】 It’s dangerous. It harms nearly every part of your body. Think about how your family and friends will feel, and think about what it will do to your health.

A．Here are five rules for a healthy life.

B．Smoking is not cool.

C．Friendships are very important.

D．But it’s important for you to get about eight hours’ sleep.

E．Fast food is not healthy.

F．To keep healthy, you have to walk at least 10, 000 steps every day.