Question 14 is based on the conversation you have just heard.

W：I wonder if you could tell me a little bit about your job as a radio announcer. (12)What do you actually do and how do you prepare for your job?

M：Well, in the news room I am sitting with reporters and news—subs, as though I air sitting in a newspaper news room.

W：Sorry, what do you mean by news—subs?

M：(13)They are sub-editors. They are the people who write the news stories as they come in. The stories are then passed to the senior duty editor and the assistant editor. As stories go through the chain of people, they are refined, corrected and sorted out until they come finally to me and (14一1) I have a chance to read through most stories before I go on the air. Of course．sometimes things happen at the last moment and I don’t have a chance. So I've just got to do my best. and take a couple of seconds to look through the first few lines before I launch into something. Because it’s such a pity if you start off on a bright tone on a story and suddenly realize you are talking about some people having been killed in a road crash. (14—2) It is very important to just have a quick flip through. 

W：There is nothing to mark what out of entity on your piece of paper. 

M：(15)No, I have my own little mark. If it's something sad, I'II put a small cross at the top. That’s my little clue. So while I am working on the news. I'm just absorbing the news and checking pronunciations. 

14．What does the mall say is a big challenge for him?　　

对话中男士指出播音之前通常有时间可以事先读完大部分的新闻故事，但是往往在最后关头也会有其他事情发生，因此并不是每次都有机会提前阅读，所以事先看一眼非常重要，因为这样能够避免工作中的失误，故选B。