下列加点词语的解释正确的一项是（   ）（3分）

A．蒙故业，因遗策蒙：继承。

B．置币遗单于币：货币。

C．臣请完璧归赵完：完整的。

D．衡下车治威严下车：从车上下来。

The next day, the group of villagers had not gone very far ____ they entered a very narrow passage between two mountains.

A．after

B．when

C．until

D．while