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

---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：短语辨析。On purpose故意的；by accident偶然的。故A正确。

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