When you exercise, it is really important to drink lots of water because you lose (失去) water quickly at this time. Also, when your muscles (肌肉) work hard, they need water. When the weather is hot and you are going to do sports for a long time, you need more water. When should you drink water?

An hour before the games or “high-energy” activities	1 glass
Every 20 minutes in the games	1 glass
After the games	2 glasses

  After you finish doing sports, it can also be a good idea to have some juice or other drinks with sugar in it, and you can recover quickly. A sports drink is good if you are going to exercise more than an hour.
It is not a good idea to drink water until (直到) you’re thirsty.
Why do we need to drink water when we exercise?

A．Because it is too hot.	B．Because we feel tired.
C．Because we lose water quickly.	D．Because the muscles like water.

What does “recover” mean here in Chinese?

A．解渴

B．恢复

C．兴奋

D．强壮

What can be the best title (标题) for the passage?

A．Exercise and Health	B．Hot Weather and Sports
C．How to Exercise	D．Exercise and Drinking Water