---Look! The telephone is broken. Someone damaged it purpose.-That may be right. But p

---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

(答案→)A. on; by B. by; by C. on; on D. by; on解析： 试题分析:考查介词用法。固定短语：on purpose“故意地”，by accident“偶然地”，由此判断A选项正确。句意：--看！电话坏了。有人故意把它损坏了。--可能是。但也或许是偶然弄坏的。

就是这个解释