is as_ as her mother is beatiful.

问题描述:

is as_ as her mother is beatiful.
She is as_ as her mother is beatiful
a,plain b,common c,dull d,humble
题目就是有两个谓语啊 也不知道怎么回事
后面为什么还要跟is beatiful 这什么句型啊

选A
这是道专四的题,当时本人也不明白,偶们老师说这里是一种as引导句子的用法……