My father returned at 10 o’clock of June 15.A. in the nightB. by the nightC. on the night

问题补充：

My father returned at 10 o’clock of June 15.

A. in the night

B. by the night

C. on the night

D. at night

答案：

A. in the night

B. by the night

(答案→)C. on the night

D. at night

解析：in the night无此说法；by the night到某天晚上为止；on the night在某天晚上；at night在夜里。句意：在六月十五日晚上十点钟，我父亲回来了。结合语境可知本句中表示在具体的某一谈晚上，故用介词on，选C。