Was your cousin bornthe nightOctober 1st?A. on inB. at onC. at ofD. on of

问题补充：

Was your cousin bornthe nightOctober 1st?

A. on, in

B. at, on

C. at, of

D. on, of

答案：

A. on, in

B. at, on

C. at, of

(答案→)D. on, of

解析：介词考查题。在某天的晚上用“on”