单项选择题
A．full B．free C．extra D．long
A．It is wrong to give more pay to the passengers. B．Don’t believe them if they are paying you more. C．Don’t follow others to overcharge the passengers. D．It is difficult to work hard and live as an honest boy.
A．How Hard Life Is for Box Boys B．Getting along with Customers C．Why I Gave up My Job D．The Art of Taking Tips