第11题: [单项选择]Questions 11~13 are based on the following dialogue about post service.How long did it take for a letter to get to the USA six years ago A. Usually four or five days. B. A week. C. More than a week. D. It depends. 参考答案:C 答案解析:[听力原文] 11~13 W: I want to mail this letter overseas. M: OK, Ma’am. I’ll have to weigh it first