单选题 <iframe src="/ananas/common-modules/audioplay/audioplay.html?objectid=9a015ad380bc9502893a6b221f60a9de"></iframe>小题:Section B (40%, 5 point for each.) Directions: In this section, you will hear two long conversations. At the end of each conversation, you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. Then blacken the corresponding letter on the Answer Card. Conversation One Questions 6 to 9 are based on the conversation you have just heard