仔细阅读下面的短文，在思维导图的空白处填入恰当的内容。
Carpooling (拼车) for School
In the US, students often carpool. When your school doesn't have a school bus and your home is not near, you can carpool. Usually three or four students go to school in the same car. Their parents take turns (轮流) in taking the students in their cars.
The students have to be on time, because nobody wants to be late for class. If you are in the car and wait (等) for a friend for a long time, you will be unhappy. Your friends will feel the same way when you let them wait. Students learn a great lesson—to be on time.
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