We all need to exercise. Doctors say it is good for us. It makes your heart and body strong. It also gives you more energy. And you will feel better about yourself. It’s best to exercise twice a week. Twenty minutes each time is enough.

There are many ways to exercise. You can walk, run, play sports, or swim. Many people go to special places to exercise.

They are called “fitness centers”. These places have a lot of equipment. Some people buy equipment for their families. But it is very expensive.

Exercising can be fun. Friends can exercise together at a fitness center. They can also play sports together. How do you exercise?

【小题1】We should exercise ______.

A．every day

B．20 minutes a week

C．twice a week

D．twice a month

【小题2】Which of these kinds of exercising is not mentioned in the article?

A．Dancing.

B．Swimming.

C．Playing sports.

D．Running.

【小题3】Which of these sentences about exercising is true?

A．Exercising is expensive.

B．Exercising is good for your heart.

C．Only doctors exercise.

D．It’s best to exercise three times a week.