M: Betty, where did you go yesterday? W: I went to visit a friend of mine in the hospital. M: What did you talk about? W: We talked about a lot of different things. M: Did you talk about the weather? W: Yes, we did. We talked about the weather and about languages. M: Did your friend ask you any questions? W: Yes, she did. I answered almost all of her questions. M: Did you ask your friend any questions? W: Yes, I did. I asked her quite a few questions. M: How long did you stay there? W: About half an hour., Question: How long has she been there? (A) An hour. (B) An hour and a half. (C) Half an hour.
(C) Half an hour.