单项选择题
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
A．he founded America B．he invaded America C．he was a brave man D．he discovered the continent of America