第13题: [单项选择]Questions 19 to 21 are based on the conversation you have just heard.A) A city planner. C) A column writer. B) A chemistry student. D) A landscape painter. 参考答案:B 答案解析:[听力原文] Who is calling Professor Brown
参考答案:when I tried to avoid thinking about those unpleasant things 答案解析:[考点] ①when引导定语从句,本句主句中先行词为times,故定语从句用when引导:②tried to表示“尽量”;③ avoid thinking about表示“避免去想”;④unpleas