【正确答案】
D
【答案解析】[解析] 19-21
M: Excuse me madam. Would you mind letting me take a look in your bag?
W: I beg your pardon?
M: I'd like to look into your bag, if you don't mind.
W: Who are you to insist? I advise you to take off, before I call a policeman.
M: I am a policeman, madam. Here's my identity card.
W: What? Oh... well... and just what right does that give you to go around looking into people's bugs?
M: None whatsoever, unless I have reason to believe that there's something in the bags belonging to someone else.
W: What do you mean belonging to someone else?
M: Well, perhaps, things that haven't been paid for?
W: Are you talking about stolen goods?
M: Exactly, but if the citizens are honest they wouldn't mind, would they?
W: Stopping people in the street and demanding to see what in their bags!
M: I'm sorry. I'm trying to do my job as politely as possible. However, I must insist on Being what you have in you bag.
W: And what, precisely, do you expect to find in there?
M: Thank you madam.
W: Net at all.
M: Mm. Sixteen lipsticks?
W: Yes, nothing unusual in that I like to change the eater with my mood.
M: I see you smoke a lot. Fifteen cigarette lighters!
W: Yes, I an rather a heavy smoker.
M: Now are you going to come along quietly or am I going to have to call for help?
W: But this is unfair!
19. What does the man do actually?
[详细解答] 显然这个男人是一个便衣警察。因为他拿出证件表明身份，所以不是侦探，更不是商人和闲逛者，很容易就应选择D。