试题出自试卷《全国医学统考2017年考博英语真题》

问题1选项
A.It could be 3 days.
B.It could be 3 months.
C.That's an easy question to answer.
D.That's an impossible question to answer.

D

W: How long do we normally have to wait till they give us an answer?
M: How long is a piece of string. It could be 3 days or 3 months.
Q: What does the man mean?

【解析】推断题。根据男士的回答：It could be 3 days or 3 months（可能是3天或者3个月）推测，这是一个不容易回答的问题。