Lucy: Hi, Jack. What are you doing?
Jack: I am preparing for my school report next week.
Lucy: ?
Jack: It's about Yungang Grottoes (云冈石窟), one of the most famous places of interest in China.
Lucy: That sounds great. ?
Jack: Yes. I went there last year.
Lucy: ?
Jack: It's at the southern foot of Wuzhou Mountain in Datong City, Shanxi Province.
Lucy: I see. ?
Jack: There are 45 main grottoes. And the tallest statue (雕像) is 17 meters tall.
Lucy: 17 meters? That's really tall. .
Jack: Just do it! I'm sure it'll be an eye-opener for you.