下面这些题,请逐条回答,1.The young man rushed to the hospital ___ she h

下面这些题,请逐条回答,
1.The young man rushed to the hospital ___ she heard the terrible news.
a.the moment when b.for the minute c.the instant
为什么选C?
2.The are centre is ____ used to be a factory,where millions of tractors were made.
a.what b.where c.that
为什么不能用that而用what?能用which吗?为什么?这个是什么原因?
3.-The parents try to do everything for their son.
-That's ____ they are mistaken.
a.where b.when c.how
为什么不能用C,这个是什么语法?
4.Whatever words I use can not express my appreciation of your timely help.
此剧中whatever可以换成No matter what吗?为什么?
5.in the possession of 与 in possession of 的区别是什么?
6.The boss required everyone,without exception,___ the meeting tonight.
a.would blamed b.attending c.attend d.attended
为什么不能选A,这个是什么语法呢?