听下面一段材料,回答第1至3题。 1. Why didn't the boy book the room before? A. He forgot to do so. B. He didn't know how to book it. C. He was too busy 2. When will the competition begin? A. At 6: 30 p.m. B. At 3: 30 p.m. C. At 3: 45 p.m. 3. What can we learn about the competition? A. It will be held in Room 501. B. A computer is needed. C. The boy will take charge of it.