now their talks have reached a key stage____one side must give in to the other.

题目

now their talks have reached a key stage____one side must give in to the other.
A which B that c where D how

答案

c 遇到point stage occasion 使用where表达抽象的一个点,也可用还原法,把a key stage放后面显然句子要通顺就得加个介词in所以用where 表方位