A、About 10 years. B、About 8 years. C、About 20 years. D、About 12 years. A根据回答“在我十岁的时候妈妈给我买的，现在我都20岁了。”可计算得知选A。

W: Well, what are you going to eat? The pork is very good here.
M: Umm…I had pork yesterday. I think I’ll have the beef.
Q: Why doesn’t the man want to eat pork?

W: Your bike looks quite new. When did you buy it?
M: My mother bought it for me when I was ten years old. Now, I’m already 20 years old.
Q: How long has the man used his bike?