题目内容：
听力原文：M: So, Jane, how long have you been an author?
W: Well, Tom, I didn't start writing until I was in my thirtieth, and I'm over seventy now. So goodness, I must have been writing for about forty years.
How long has the woman been an author?
A．About 30 years.
B．About 40 years.
C．About 60 years.
D．About 70 years.
参考答案：