— Look! The window is broken. Someone broke it _____ purpose.
— That may be right. But perhaps it was broken _____ accident.

A. on; by
B. by; by
C. on; on
D. by; on
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科目：高中英語 來源：同步題 題型：單選題

— Look! The window is broken. Someone broke it _____ purpose.
— That may be right. But perhaps it was broken _____ accident.
[     ]
A. on; by
B. by; by
C. on; on
D. by; on

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