Question

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

A．if

B．after

C．until

D．when

Answer 1

C

解析试题分析: 句意：——人们经常不会感激他们所拥有的，是吗？——是的，直到失去它们的时候。A如果；B在……之后；C直到……时候；D当……时候。根据上句可知此处是省略，补充完整应该是people often don’t appreciate what they have until they lose it .答案选C。
考点：考查连词用法。