문제 내용: 두 사람의 대화 중 자연스럽지 않은 것은?
선택지 1: ①A: How would you like your hair done?
  B: I'm a little tired of my hair color. I'd like to dye it.
선택지 2: ② A: What can we do to slow down global warming?
  B: First of all, we can use more public transportation.
선택지 3: ③ A: Anna, is that you? Long time no see! How long has it been?
  B: It took me about an hour and a half by car.
선택지 4: ④ A: I'm worried about Paul. He looks unhappy. What should I do?
  B: If I were you, I'd wait until he talks about his troubles.