听力原文： Mr. Baker is very happy to see Miss Green every morning because she is a good secretary. One Monday Miss Green didn’t come to work because she was iii. She had a terrible cold and a bad headache, so she phoned Mr. Baker. (The telephone rings. )
W: Good morning, Mr. Baker.
M: Good morning, Miss Green. What’s wrong？ Where are you？
W: I am at home. I' m iii. I' m afraid I' ye got a terrible cold and a bad headache.
M: I' m very sorry to hear that. Well, you ' d better stay at home.
W: Thank you, Mr. Baker. See you tomorrow.
M: See you tomorrow. Goodbye.
W: Goodbye, Mr. Baker.
Where did the dialogue happen？

A. In the office.
B. On the phone.
C. At home.