听力原文：W Hello, front desk？ This is Mary Beth Jones in room 612.1 am waiting for a package. Has it arrived yet？
M Just a minute, Ms. Jones. I'll have a look. No, there doesn't seem to be anything here.
W Could you also look under S？ It may be addressed to Mr. Simpson, my secretary. It should be in a red envelope.
M Yes, it's here waiting for Mr. Simpson. You can pick it up at the front desk anytime.
Where most likely are the speakers？

At a post office
B. At a hotel
C. At a check-in counter
D. At a meeting room