—People often don't appreciate what they have, do they?

试题详情及答案解析

—People often don't appreciate what they have, do they?
—No, _________ they lose it．

A．if

B．after

C．until

D．when

答案：C

试题分析：句意：---人们经常不珍惜不欣赏自己拥有的，是吗？。---是的，直到他们失去了才知可贵。A．if如果 B．after 在．．．之后C．until直到 D．when当时。根据句意，故选C。
考点：考查状语从句的用法。