Question

一个定语从句的完成句子题

The present children are especially fond of telling lies to their parents,-------------------（在这种情况下）parents should be strict.（case）
答案：in which case
疑问： 我感觉这不是非限定性定语从句，一般非限定性定语从句中which在介词后是作为介宾的，但是这个地方的which怎么能做case的定语呢？反正我以前没见过这种句子和语法现象。请各位解释一下，谢谢~

Answer 1

这在美语中非常普遍。引导非限制性定语从句的which 可指代的东西很多，如 1，可指代主句中的名词， These apple trees，which I planted three years ago，have not borne any fruit.2，指代主句中的形容词。She was very patient towards the children，which her husband seldom was. 3，which指代主句中的某个从句。 He said that he had never seen her before，which was not true. 4，指代整个主句。In the presence of so many people he was little tense, which was understandable.
知道这些，你应该不会再纠结which 怎么能作case的定语了吧。我们不知道的东西太多了，但不能就因此断言这就是错的，对不？