英语急救，

Question

she was disappointed to know the holiday she had been looking forward to ( )Acanceled Bcanceling C was canceled Dbeing canceled 答案选C，我知道是非谓语，但怎么解释啊，要详细，谢大家了，
ABD为什么不选啊，分析原因，谢了，

Answer 1

she had been looking forward to 在这里是插入的定语从句，修饰the holiday 。她知道期望的假期被取消感到很失望。把she had been looking forward to 去掉后，可以写成she was disappointed to know the holiday was canceled 。

the holiday 是被取消，A、B都是主动，D 正在被取消，取消是一种状态，是没有正在进行的。

Answer 2

这个句子是从句套从句，结构复杂，所以先来分析一下。
she was disappointed to know（主句）
the holiday she had been looking forward to was canceled（know的宾语从句）
the holiday was canceled（宾语从句的主体）
she had been looking forward to （宾语从句中the holiday的定语从句）
好了，结构就是这样的，能理解了吧？

Answer 3

她很失望的了解到 她原本很希望的假期被取消了。
She had been looking forward to 用来修饰the holiday。她Know 的内容是 the holiday was canceled。