Section B Directions: This section is to test your ability to understand short conversations. There are 2 recorded conversations in it. After each conversation, there are some recorded questions. The conversations and the questions will be spoken only once. When you hear a question, you should choose the correct answer from the 4 choices marked A, B, C, and D. 听力原文：W: When did you become interested in collecting stamps? M: Oh, when I was about ten years old. It's an exciting hobby. You know, the first postage stamps were issued in Britain in 1840. W: Really? I didn't know that. I did know that the charge for mail delivery before the appearance of postage stamps was paid by either the sender or the receiver. How much was the usual charge? M: Oh, about ten cents for a short distance. But post offices were losing money with that system. Rowland Hill, an Englishman, suggested using postage stamps. Here's a picture of the first two stamps issued. W: They both bear a picture of Queen Victoria. Q9: When were the first postage stamps issued? (6)