[单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. Establish personal contracts. B. Further personal contacts. C. Investigate personal contracts. D. Sell medical facilities.
参考答案:B 答案解析:[听力原文] What is the main purpose for the man to go to eastern countries [答案详解] 推理判断题[考频:13