A、Never speak to visitors that you are not familiar with. B、Never leave windows open when you are away. C、Install proper locks f

W: Which channel do you want?
M: News Channel please. I’d like to watch the worldwide news. A piece of news about crime prevention today impressed me most.
W: Really? Tell me about it.
M:(13)Well, it said most criminals are opportunists simply taking advantage of promising situations.
W:(13)It meant that people should develop an attitude of constant awareness of preventing crime every day, didn’t it?
M: Right. The key to effective crime prevention is to remove the opportunities for crime. Some precautions are always required. People are also required to protect themselves at home from robbery.
W: How could that happen at home? That’s what I’ve never expected.(14)I always take it for granted that the safest place is home.
M: It used to be a matter of fact. But now(14)some criminals probably have knowledge of psychology. That’s why chances are that they manage to rob valuables at private homes.
W: Sounds terrible. You would scare me to death, wouldn’t you?
M: Gee! How dare I do that! But there’re some tips you should take into consideration. First,(15)be sure all your windows and doors have proper locks. Second, when someone knocks at your door, don’t open it quickly but use peephole(窥视孔)and speak through the door. Third, never open the door for strangers and unexpected deliveries. Last but not least, don’t fight back unless there is a good chance of getting great help.
W: I see. It seems that I have to be alert afterwards.
13. What did the news say about criminals?
14. Why do some robberies happen at private homes?
15. What does the man suggest people do to prevent crime at home?