M:Hi ,mary!Long time no see!Where have you been these days?
W:I was sent to some Asian coutries to study wildlife there.
M:Oh ,really?Did you go to China You know ,the panda of china is world famous.
W:Yes,I did.We went to Sichuan Province to see wild pandas.There are more than ever before.
M:That's it .I have seen about it on TV.Where else did you go?
W:Well,lots of places .We have been there for over two months.
M:That must be very interesting!
W:Yes,a bit hard though.I am sorry,but Ihave a lecture to give now.
M:Ok.Maybe sometime next week I can visit you for more stories.
w:Sure.
回答：Where may the conversation take place?
A.In the street.B.On a plane C.In university.
說明理由!