We all need to exercise．Doctors say it is good for us．It makes our heart and body strong．It also gives you more energy(能量)．And you will feel better about yourself．It’s good 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(健康中心)”．These places have a lot of equipments(设备)．People can do different sports there．Some people buy equipments for their homes．But it is very expensive．
Exercising can be fun．Friends can exercise together at a fitness center，or they can play sports together．How do you exercise? How often do you exercise?
It’s good to exercise_______．

A．every day	B．20 minutes a week
C．twice a week	D．twice a month

At fitness centers，_______．

A．you can buy expensive equipments

B．people can do many kinds of exercise

C．it is very expensive

D．exercising is not popular

Which of these kinds of exercise is NOT mentioned(被提到) in the passage? __________．

A．Playing sports．

B．Swimming．

C．Running．

D．Dancing

Which of these is TRUE? __________．

A．Exercising is expensive．

B．Exercising is good for your heart．

C．Only doctors exercise．

D．Friends never exercise together．

What is the main idea of this passage? __________．

A．Exercise equipment is expensive．

B．Playing sports is the only way to exercise．

C．Everyone should exercise．

D．Fitness centers are popular．