(B)Here are some idioms, please read the following dialogue, and answer the questions.  I.    Break a leg.     Ken: Congratulations, you are going to make your debut in the stadium.  John: Thanks, Ken. I am glad you come to my show. I am very nervous now.  Ken: Oh, come on. All you can do now is to relax yourself. You will be fine. Break a leg.  John: I will. Thanks again. 

make one’s debut 首次登台 relax 放鬆 
 II.    An elephant in the room.     John: Hey, the air is getting worse and worse. We don’t have the fresh air anymore.  Amy: We could see the top of the mountain over there before, but now we can’t see it.  John: We should do something to make the air cleaner and protect the environment.  Amy: How can we do? We are nobody. Don’t you see those factories emitting the bad air? The government should start to dealwith that problem.  John: That is an elephant in the room. Everyone can feel the bad air, but no one wants to solve it.  Amy: How bad it is! 

emit 排放 government 政府 solve 解決
【題組】3.What does break a leg mean?
(A) It means something bad will happen on the show.
(B) It means good luck to the people on the show.
(C) It means people should be careful on the show.
(D) It means people need to take a rest after the show.