---Look!Thetelephoneisbroken.Someonedamagedit

问题详情：

 --- 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

【回答】

A

知识点：介词

题型：选择题