单选题 More and more people like to travel now. But what kind of transportation (交通方式) do you like best, a plane, a train or a car? Different people have different ideas. Many people like to travel by plane because they think it's fast. But I don't like it because the airport is usually far from the city and it always takes me much time to get there or get out of it. I like traveling by train. First, traveling by train is cheap. Second, you can walk around in the train and can see many interesting things on your way. Last, you may meet and talk to some interesting people on a long train trip, and maybe you can make some new friends. But sometimes it takes a little more time.I also like cars. You can start your trip when you want to, and you can also take many things with you in a car. But sometimes there are too many cars on the road, and you have to wait and wait小题:Many people like to travel by air because they think _______.( )