Conversation One
　　W: Hello, Patrick, is that you?
　　M: Yeah Jane, what can I do for you?
　　W: I was calling about the apple tree that you were trimming yesterday.
　　M: That was hard work!
　　W: I'm sure it was. It true looked difficult.
　　M: Yeah, I'm glad it's finished.Hauling the branches to the front for garbage pick-up was no fun either.
　　W: Well, I don't think you're quite finished yet,some of the larger branches fell over into my yard,and I think you should come and get them.
　　M: Listen Jane, I don't see why I should do that.You've eaten all the apples that fall in your yardand you've never complained about that before.
　　W: Well, it's easier to pick up apples than to drag tree branches all the way to the curb.
　　My kids pick up the apples, and the branches are just too big for them to drag.
　　M: Well, I guess you'll just have to do it yourself Jane.
　　W: Patrick, I wish you would reconsider.We've always gotten along fairly well,but I think you're out of line here.The branches are your responsibility.
　　M: Sorry Jane, I disagree!You take the benefits of the apple tree,but refuse to deal with the bad side of it!Besides, it won't take you any time to get the branches out front!
　　W: Get the branches off my property or I'll have to sue you.
　　M: Yeah? For what?!You're taking those law classes too seriously!I've gotta go, I have to pick up my son.
　　W: You'll be hearing from me.
　　M: Yeah, yeah. See you in court Jane.

　　19. What did the man do yesterday?
　　20. What did the woman ask the man to do?
　　21. What did the woman threaten to do?
　　22. What was the man's reaction to the woman's threat?

　　Conversation Two
　　M: Did you hear about the air crash that occurred in South America recently?It was quite a tragic accident!
　　W: No, I didn't see anything in the news about it.What happened?
　　M: A foreign airliner was attempting to land at night in a mountainous area of Argentina and flew into a hill!
　　W: That sounds really terrible! Did anyone survive?
　　M: No, everyone aboard, including the crew, was killed instantly.
　　W: What were the circumstances?Was there bad weather, a fire, or engine failure?
　　M: Apparently, there were some low clouds in the area,but mostly it was just miscommunication between the pilots and the air traffic controllers.
　　W: Weren't they both speaking in English,the official international aviation language?
　　M: Yes, they were. But the transmission from poor quality radios was slightly distorted and the accents of the Spanish speaking controllers were so strong that the pilots misunderstood a vital instruction.
　　W: How could a misunderstanding like that caused such a serious accident?
　　M: The pilots were told to descend to two-two thousand feet.The instruction actually meant 22 000 feet,but they thought they heard descend to 2 000 feet. That's a huge difference, and it should have been confirmed,
but it was not. Unfortunately, the terrain of the mountains in Norweija extends up 20 000 feet.
　　W: So the pilots did descend to the wrong altitude then,thinking they were following the air controllers'instructions.
　　M: Sadly enough, yes they did. It was a really bad mistake.Many people died as a result of the simple misunderstanding.
　　W: Wow, that's a powerful lesson on how important it can be to accurately communicate to each other.

　　23. What was the cause of the tragedy?
　　24. How high are the mountains in Norweija?
　　25. What lesson could be drawn from the accident?