⑴Hyde Park A.
⑵Buckingham Palace B.
⑶Big Ben C.
⑷Tower Bridge D.
A. It's Tian'anmen Square.
B. Yes, it is.
C. What's this?
D. It's very nice.
A:
B: It's a book about China.
A: Can I see it? B: Of course.
A: What's this?
B:
A: Is it in Beijing?
B: It's very famous and beautiful.