第二部分：
第一节 单项填空（共25题，每小题1分）
21. The old building possibly ________ the Ming Dynasty.
A. is dated back to B. dates from C. is dated from D. dates back
22. The young man ________ to the forest and he himself ________ in prison.
A. set fire; ended up with B. caught fire; ended up with
C. caught fire; ended up D. set fire; ended up
23. There are two rooms on the first floor, ________ is used as a guest room.
A. a smaller of which B. a smaller of them
C. the smaller of which D. the smaller of them
