外研社七下阅读理解专题练习第一篇Modern life is impossible without traveling. The fastest way of traveling is by air. With a modern airliner（客机） you can travel in one day to places, which took a month or more to get a hundred years ago. Traveling by train is slower than by air, but it has its own advantages（便利）. For example, you can see the country you are traveling through. Besides, modern trains have comfortable seats and dinning cars. They make even the longest journey enjoyable and comfortable.
