【题目】Whether you did it ________ purpose or ________ accident, you have hurt her deeply.
A.on; by
B.by; by
C.by; on
D.on; on

【答案】A
【解析】on purpose意为“故意地”，相当于by design; by accident意为“偶然地；不是故意地”，它与on purpose的意思 相反。