We can not live a modern life without traveling. The fastest way of traveling is by air. With a plane one can travel in one day to places which it took a month or more to get to a hundred years ago. Traveling by train is slower than by plane, but one can see the country he is traveling through. Modern trains have comfortable seats and dinning-cars. They make even the longest journey enjo yable. Some people prefer to travel by sea when possible. There are large luxury liners or river boats .They are not as fast as trains or planes, but traveling by sea is a very pleasant way to spend a holi day. Many people like to travel by car. They can make their own timetable. They can travel hundred s of miles a day, just as their wish. They can stop wherever they want to see something interestin g or to enjoy a good meal at a good restaurant, or to spend the night at a hotel. That is why peopl e choose traveling by car for pleasant trips, while they usually take trains or planes for business.According to the passage, the fastest way of traveling is    _   .
bycar bytrain byplane bysea