A、With a knife. B、On the edge of some metal. C、On some glass. D、On a piece of paper. D由男士所回答的“on the edge of this paper”可知，是纸张的边

M: Ow! That hurts!
W: What happened? Did you cut yourself?
M: Yes—on the edge of this paper. How can such a little cut hurt so much? I’ m not even bleeding, but my finger really hurts.
W: You know, I read something about that. It turns out that a little cut on a finger can hurt a lot more than a big cut somewhere else.
M: Why? That doesn’ t make any sense.
W: Actually, it does. There are more nerve endings in your hands than almost anywhere else in the body, and it’s the nerve endings that allow you to feel pain.
M: l guess that’s true.
W: Then just go get yourself a bandage.
Q10: How did the man cut himself?
Q11: What surprised the man?
Q12: What advice does the woman give the man?