A、When on normal duty. B、Whenever they go out. C、When chasing a drug smuggler. D、When chasing an armed criminal. D预览选项可知，本题考查时间。

W: Excuse me, would you mind answering a few questions?
M: Well, I don’t know. I’m in rather a hurry actually.
W: It won’t take a moment. We’re doing a public opinion poll on some important political questions to try to find out if the government really has support for its policies. The results are going to be published in a national newspaper.
M: Oh, all right, then.
W: Thanks. Well, I’ll read out statements and you have to say whether you agree strongly, agree, disagree, disagree strongly or just don’t know. OK?
M: Yes.
W: Well, first of all, "Policemen should always carry guns." Do you agree?
M: No, not always.
W: What is your opinion?
M: They shouldn’t do that when they’re on normal duty. But if they’re chasing a criminal who they know has got a gun, then they should be armed as well.
W: OK, next question: "Britain should drive on the right-hand side of the road."
M: What rubbish! Why doesn’t everybody else drive on the left?
W: All right. One more question: "Britain should leave the EEC."
M: That’s nasty. I wasn’t in favor of us joining, but I think it would be difficult to leave now. I think we’ll just have to stay in and make the best of it.
W: OK, that’s all. Thank you very much.
Questions 19 to 22 are based on the conversation you have just heard.
19. What is the possible relationship between the two speakers?
20. When does the man think the policemen should carry guns?
21. How does the man think about driving on the right?
22. What’s the man’s opinion about the last statement?