1 阅读理解专项训练 People are busy working every day
They do not have enough time to do exercise
So many people become too fat or too thin
We need to do exercise to keep fit
There are many kinds of exercise
Bending and stretching helps us move easily
Before we play ball games or swim, we shall do bending and stretching exercise first
This kind of exercise is sometimes called warm-up exercise
Running is also good exercise
If we cannot run fast, we can jog
Jogging means running slowly
Again, before we run or jog, we must do some warm-up exercise
Also, we should not run or jog in busy streets
It is not safe and the air there is often dirty
makes many people too fat or too thin
Eating too much B
Drinking too much C
Having no time to do exercise D
Doing too much exercise ( )