I called his house this morning but he wasn’t in. So I left a message telling him I woul

问题补充：

I called his house this morning, but he wasn’t in. So I left a message telling him I would call him the next day.

A. on; on

B. at; at

C. at; on

D. on; at

答案：

A. on; on

B. at; at

(答案→)C. at; on

D. on; at

解析：可联系答.案.网客服索取。