—When is your birthday? —It’s December 25th.A. atB. inC. ofD. on

问题补充：

—When is your birthday?

—It’s December 25th.

A. at

B. in

C. of

D. on

答案：

A. at

B. in

C. of

(答案→)D. on

解析：

试题分析: 句意：你的生日是什么时候？是12月25日。月日前用介词on，故选D