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:
1. You have to like what you’re doing.
2. Exercise enough, but not too much. It’s best to exercise twice each week. Thirty minutes each time is enough.
3. Try all kinds of things until you find one, two or even three sports right for you.
Lots of people choose to exercise at fitness centers. Why? Because there is a lot of sports equipment(器材) there. The equipment will help exercise your arms, legs and other parts of your body to make you healthy.
Exercising can be fun. Friends can exercise together at a fitness center or they can play sports together outside. How do you exercise?
根据短文内容，判断句子的正（T）、误 (F)。（5分）
小题1:The writer tells us that we all need to exercise to make our body strong.
小题2:According to the passage, it’s best to exercise three each week and an hour each time.
小题3:Exercising too much is good for us and it makes us laugh and happy.
小题4:All of people think that they should choose to play sports at fitness centers.
小题5:The equipment can help people do more exercise to keep healthy.
3-丁醇
甲基苯酚
2-甲基丁烷