The reason _ she gave for not coming to the party puzzled all of the people present.A.what B.why C.as D.which
问题描述：
The reason _ she gave for not coming to the party puzzled all of the people present.A.what B.why C.as D.which
为什么?
答
The reason puzzled all of the people present.是主句,意思为,这个原因使在场的所有人感到不解.
什么样的原因呢,定语从句.she gave (the reason) for not coming to the party,她没来参加聚会的（原因）,the reason是先行词,在定语从句中做gave 的宾语,所以用which.
A.what不是关系代词,B.why 引导原因状语,C.as 同常 引导一句话.