The Blacks will be back from their holiday two days.A. forB. laterCinD. behind

问题补充：

The Blacks will be back from their holiday two days.

A. for

B. later

Cin

D. behind

答案：

A. for

B. later

(答案→)C. in

D. behind

解析：in后接一段时间表示的是在未来的时间里发生的动作，故选C