第28题: [单项选择]Questions 25 to 26 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. What is the topic of the news A. Riots. B. Hunger. C. Food prices. D. Peace forc 参考答案:C 答案解析:[听力原文] 25-26 United Nations Secretary General Ban Ki-moon says he will head a task force to