一道高中语法题they stayed with me three weeks,----- they drank all

这是考定语从句中的which指代问题
在非限定定语从句中 which可以指代上句中的任何内容 比如 Lucy is very kind to children , which her husband is not 这句的which 就是指代very kind to children
并且which有时可以做定语 题中的which就是指代他们和我共度的three days during which time 就是说 在这三天的时间中 这种语法现象虽然很常见 但是在高中往往就是“during which time”和“in which case”这两个固定句型