[多选] （二） Today， we can travel by train and plane． They are very fast． Trains and planes can carry both people and foods． Trains leave from stations． They go along the tracks． Planes leave from airports． They fly through the sky． Some trains run across the countries． But some trains only go in cities． Some trains go underground． Underground trains are subways． There are large planes and small planes． Some people have small planes． Large planes belong to（属于） some big companies（公司）． Most people travel in the big plane． 1． The best title of this passage should be “（）”．