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:
答案解析:
What are they talking about?
What are they talking about?A.Their best friend. B.Their favorite color. C.The c