He invited me to a dance after the show Christmas Eve.A. atB. onC. inD. by

问题补充：

He invited me to a dance after the show Christmas Eve.

A. at

B. on

C. in

D. by

答案：

A. at

(答案→)B. on

C. in

D. by

解析：on Christmas Eve是“在圣诞节前夕”。表示具体某一天的上、中、下午及夜晚，也用介词on。