听一段材料，回答下面几个小题。
Who does the man buy a gift for?
A. A Japanese friend.
B. A Japanese family.
C. A Japanese teacher.
What does the man decide to buy at last?
A. A set of pen and pencil.
B. A bigger set with four pens.
C. A set of a pen and four pencils.
What can we learn from the conversation?
A. Japanese language.
B. Japanese culture.
C. Japanese education.