---Is ChristmasDecember 25th or 26th ?-25th I think.A. onB. inC. atD. for

问题补充：

---Is ChristmasDecember 25th or 26th ? ---25th, I think.

A. on

B. in

C. at

D. for

答案：

(答案→)A. on

B. in

C. at

D. for

解析：句意：圣诞节是十二月二十五号还是二十六号？我认为是二十五号。具体到某一天的日期前要用介词on,故选A。in用在in the afternoon,in 20 years等短语中；at用在at 9:00,at night,at noon中；而for后跟一段时间。