单项选择题

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 ～ 13 are based on the following passage. What did the speaker use to do for a living