---Look at that lady on the stage.She is already fifty.

---Look at that lady on the stage.She is already fifty.
---You are joking.She doesn't look ________
A,so B,it,C that,D the one
it指代fifty,
so,that为什么不可以?
I don't think so.中,so可以作名词,为什么这里就不可以?
that也可以指代年龄啊
字典上一个句子so：pron.
如此，这样：例句:I'm well and will remain so.
所以这里也可以用so指代she is already fifty啊。
但答案是it,没错。
而且常用句是She looks young.look后面是接形容词的啊，怎么接it呢
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[V-N]That looks an insteresting book.这个句子不知道回答者从哪看来的，但是不对，look不这么用的