I know nothing about the young lady ______ she is from Beijing .
A.except B.except for C.except that D.besides
答案选C,为什么不能选A啊?

1. besides 表示“除了。。。以外还有。（包括当事人）
Eg. Besides Tom ,we went to see the film.
TOM和我们都去看电影了。

2. Except 表示“只有。。。除外”（不包括当事人）
We all went to seen the film except Tom.
除了TOM，我们其他人都去看电影了。

Except后面还可以
(1) 接名词性从句，
I know nothing about the young lady .except that she is from Beijing .

(2) 状语从句，

(3) 副词，
We looked everywhere except there.

(4) 介辞短语
We looked everywhere except in the bedroom.

(5) 不定式
注意，EXCEPT后面加动词不定式带TO或不带TO，主要取决句中的主要动词是否是DO
Mary does everything except wash the car.
It has no effect except to make him angry.

3． except for 当EXCEPT用在句前时，往往加FOR
Except for Tom,we all went to see the film.
= We all went to see the film except Tom.

4．题目的意思是，关于这位年轻的女士，我除了知道她来自北京以外，其他一概不知。
这句话是EXCEPT加名词性从句的用法，所以选C

5.如果选A,这句话就变成病句了,因为有两个谓语动词,KNOW 和 IS