阅读短文，选择正确答案。
Everyone knows that exercise is important. We all need to exercise. Doctors say it is good for us. It makes
your heart and body strong. Children who often exercise are more alert (灵活的). This means they do better
in tests and schoolwork than those who don't exercise.
There are many ways to exercise. You can walk, run, swim, skate, or play ball games. Make sure you
exercise in the following ways: you have to like what you're doing. Exercise enough but not too much. It's best
to exercise twice each week. Thirty minutes each time is enough. Try all kinds of things until you find one, two
or even three sports that feel right for you.
You can exercise at fitness centers (健身中心). They have a lot of equipment (设备) there. The equipment
will help exercise your arms, legs and other parts of your body to make you fit. Some people buy equipment 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?
1. In the passage, the writer tells us that we all need to _______. [ ]
A. drink
B. sleep
C. exercise
D. work
2. Which of the following sports is not mentioned in the passage?[ ]
A. Fishing.
B. Running.
C. Swimming.
D. Walking.
3. Where can we exercise according to the passage? [ ]
A. In the restaurants.
B. In the hospitals.
C. At fitness centers.
D. At the bus stops.
4. Why do we need to exercise? [ ]
A. Because we have nothing to do.
B. Because it makes us strong.
C. Because it's boring.
D. Because we can spend time.
5. Which of the following is not true according to the passage? [ ]
A. Some people buy equipment for their homes, but it's very expensive.
B. Children who often play sports do better in the schoolwork.
C. Try all kinds of things until you find the sports that are right for you.
D. It's best to exercise at least five times every week.