次の対話文を読んで、あとの問いに答えなさい。
Ken: Are you from Tanzania?
Kileo: Yes, I am. My country has great lakes, huge animal parks and Mt Kilimanjaro.
Ken: It sounds wonderful. Have you lived in Japan for a long time?
Kileo: Yes. I have lived in this town for several years.
Ken: What are you doing in Japan?
Kileo: I'm studying biotechnology.
Ken: Have you studied it for a long time?
Kileo: Yes, I have. I have studied it for eight years.
Ken: Oh, it's long!