He left home a cold morning and I heard that he was coming back the late afternoon.A. in

问题补充：

He left home a cold morning, and I heard that he was coming back the late afternoon.

A. in; on

B. on; on

C. in; in

D. on; in

答案：

A. in; on

B. on; on

C. in; in

(答案→)D. on; in

解析：句意：他在一个寒冷的早晨离开的家，我听说他会在那天下午较晚的时候回来。具体到某一天的一个早晨用介词on，在下午则用介词in；故选D。