Man: The front tire is flat, and the seat needs to be raised.
Woman: Why not take it to Mr. Smith
Question: What kind of work does Mr. Smith probably do

A．Yes. I did a lot of research to do it.
B．No, it is not very satisfactory.
C．Yes, I like this presentation very much.
D．Thanks. I put a lot of time into it.

A．Yes. You can keep it.
B．No. I'm afraid you should return it now.
C．Three weeks. But you can renew it if you need it for a longer time.
D．You can take it at any time you want.