单项选择题
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
A.hurt him B.given him some kind of warning C.embarrassed him D.shown concern for him