阅读下面短文，根据短文内容，从所给的六个选项中选出可以填入空白处的最佳选项，使短文意思完整、连贯。（有两项为多余选项）

                                                                                                          Car pool（拼车）

“Beep, Beep,” goes the car horn（喇叭）. You've got dressed, but you've not had time to eat breakfast. You run out of the front door with your schoolbag, and jump into the waiting car. Inside, your friends say “hey” as one of their parents drives you to school. Car pools are a common way of transport for many students in the US. You, along with many of your friends, can sit in one car. And your parents many take turns to drive you all to school.

     If you're late, you can eat that breakfast you don't have time for at home. If you're behind on your homework, this is your last chance to finish it before class. Some simply add to their sleep time before classes begin.

Besides walking or cycling to class, car pools are green if you can't take the school bus. Instead of four cars taking four students to school each day, they can all squeeze into one.

More importantly, car pooling teaches students valuable life lessons not taught in class. It can teach students about being on time. It can also teach them the bad influence of being late. If you're late, then all of your friends will be late too.