题目内容：
Questions 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：
答案解析：
单选题：Questions are based on the following dialogue about post ser
- 题目分类：公共英语三级
- 题目类型：单选题
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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.