单项选择题
A．A Good Greeting B．Don't Bother a Busy Man C．Gorge Bernard Shaw's Opinion D．A Misplace Question
A．a man walking in the street B．a friend who has fallen ill C．a person having lost a close friend D．a stranger who looks worried
A．usually makes one feel uneasy B．is a good way to make friends C．is proper to ask a man in action D．shows one's consideration for other people