have a class meeting on Friday _____ there is nothing to discuss.
问题描述：
have a class meeting on Friday _____ there is nothing to discuss.
We have a class meeting on Friday _____ there is nothing to discuss.
A.unless B.until
请讲明原因,
答
选A,unless是除非的意思,until是直到……时候的意思.比较一下,哪个在句子里合适呢?
我们星期五开班会,除非没有什么要讨论的.