Directions:
You are going to hear four conversations. Before listening to each conversation, you will have 5 seconds’ to read each of the questions which accompany it. After listening, you will have time to answer each question by choosing A, B, C or D. You will hear each conversation ONLY ONCE. Mark your answers in your test booklet.
Questions 11 ～ 15 are based on the following conversation. Which of the following best describes his mistake
A．A slip of the pen. B．Careful work doesn’t help. C．He is too critical. D．He is poor at calculating.