听力原文：M: Did you finish typing that report？W: Yes, I did, but I worked late.M: But it m

听力原文：M: Did you finish typing that report？

W: Yes, I did, but I worked late.

M: But it must be a long report, I guess.

W: Exactly. Twenty pages. I spent three hours on it.

M: By the way, what time did you go home？

W: I left the office at nine o'clock. I got home at ten.

M: What did you have for dinner？

W: I sent out for a sandwich and ate at my desk.

What was the woman doing before she went home？

A．Typing a report.

B．Rewriting a report.

C．Reviewing a report.