单项选择题
A．it is interesting B．it is cheaper than to go in any other way C．it can cross the wide oceans D．it takes less time
A．it can bring us more knowledge B．it can make us rich C．they have too much money D．it is a good idea
A．The farther a man goes, the more treasures he gets B．The more a man sees, the more knowledge he gets C．Travelling is more interesting than reading D．The farther a man goes, the more books he reads