简答题Questions 19 to 21 are based on the passage you have just heard.简答题Questions 12 to 15 are based on the conversation you have just heard.[音频]简答题Directions: In this section, you will hear three passages. At the end of each passage, you will hear three or four questions. Both the passage 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 mark the corresponding letter on Answer Sheet 1 with a single line through the centre.[音频]简答题Section B ConversationDirections: In this section, you will hear two long conversations. At the end of each conversations you will hear four questions. Both the conversations 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 mark the corresponding letter on Answer Sheet 1 with a single line through the centre.Questions 8 to 11 are based on the conversation you have just heard.[音频]简答题Questions 22 to 25 are based on the passage you have just heard.