Question

In North America，66.大多数学生坐校车去上学。 The subway is also widely used in some cities. In small towns and cities，walking is still popular.

The yellow school bus is a familiar sight all over North America. It is a very convenient form of transportation because it takes students right to the entrance to the school. 67.It also gives students a chance to chat with their friends. However, the bus is slow and does not always pick up on time. The subway is a means of getting around quickly in many cities. However, 68.it is expensive and can be very crowded during rush hour. Another disadvantage of the subway is that the stops are not close to the school. 69.学生们经常不得不走很长时间的路or take a bus from the subway stop to the school.

Walking has a number of advantages for those who live close to school. It's free and it provides a form of exercise. 70.However, it's not interesting if you have a heavy schoolbag full of books to carry. It's also unpleasant if the weather is either too hot or cold.

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Answer 1