题目内容:
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:【答案仅供学习,请勿对照自行用药等】
答案解析: