作业精灵老师示例：
Wang Bing and Liu Tao are friends.
They both know each other well.
Wang Bing is a good boy. He has
many good habits. He usually gets up
early in the morning and never goes to
bed late. He always brushes his teeth in
the morning and before bedtime. At
home，Wang Bing always puts his
things in order. He usually finishes his
homework before dinner.
Liu Tao is a good boy too.At school,
he listens to his teachers.He does well at
home, too.He keeps his room clean and
tidy. He also helps his parents. But Liu
Tao has some bad habits.He often does
his homework late at night and does not
go to bed early. He sometimes feels
sleepy in the morning.
