F: Professor Jones, you're a well-known professor of mathematics at the City College. May I ask you a few questions about your favorite hobby? ,M: Sure, I like collecting coins the most. ,F: How long have you been collecting coins? ,M: Since I was 12 years old when my uncle gave me a book with spaces to put coins into. ,F: How did your interest grow? ,M: I finished that book one year later and continued to search for rare and old ones. ,F: Where do you find your coins? ,M: Sometimes I get them from a small shops but I usually buy them from other People who collect coins.
(A) F: Can I ask how many you've spent on buying coins from amateurs? (B) F: Can I ask that which small shop of stamps you usually go? (C) F: I am afraid I did not quite catch what you were saying. Please repeat it. (D) F: Can I ask that how you found the other stamps collectors?
A