21. ―Which of the two poems do you like better?
―____ shorter one, of course. I think it’s really ____ most interesting one.
A. A; the B. The; a C. The; the D. A; a
22. ―What are you going to do this afternoon?
―I am going to the cinema with some friends. The film ___ quite early, so we ____ to the bookstore after that.
A. finished; are going B. finished; go C. finishes; are going D. finishes; go
23. I have learned from my bitter experience _____we do not know ____we got until it is gone.
A. that; that B. what; what C. that; what D. which; that
