---Look! The telephone is broken. Someone damaged it purpose.
---That may be right. But perhaps it was broken accident.
A. on; by
B. by; by
C. on; on
D. by; on
网友回答
(答案→)A. on; by
B. by; by
C. on; on
D. by; on
解析： 本题考查介词。on purpose“故意地”；by accident“偶然地”。