He regretted forgetting___was his mother's birthday and saying Happy Birthday to her

问题描述:

He regretted forgetting___was his mother's birthday and saying Happy Birthday to her
A that B which C it Dwhat 为什么选C

c He regretted forgetting (that) it was his mother's birthday and saying Happy Birthday to her这里我们看到AND 前后并列的其实是forget和say.他很遗忘忘记了,忘记了什么?忘记了一件事,用that引导的宾语从句,th...但是it在整句中 替代的是哪个?亲~代替his mother's birthday,作为形势主语