– How soon could they cover the distance?
--- .
A. For two hours
B. During the two hours
C. After two hours
D. In two hours
网友回答
A. For two hours
B. During the two hours
C. After two hours
(答案→)D. In two hours
解析：句意：他们多久能走完这段距离。两个小时之后。In + 时间段，表示将来，根据语境所以选D。