--The prison was ___________ fire last night.
--Someone must have set fire___________ it.
A. on ; with B. on ; to C. over; with D. should
--The prison was ___________ fire last night.
--Someone must have set fire___________ it.
A. on ; with B. on ; to C. over; with D. should
B
本题是介词的固定用法考查。on fire是指“着火”；set fire to是指“放火”。