The president made a speech ___ he expressed his satisfaction.A.which B.where C.D.in which

The president made a speech ___ he expressed his satisfaction.A.which B.where C.D.in which
为什么不能用Where?where也可用于抽象的场景名词呀如：(09福建)It’s helpful to put children in a situation D.where they can see themselves differently.
(09北京)–What do you think of teaching,Bob?
–I find it fun and challenging.It is a job _________ you are doing something serious but interesting.
A.where B.Which C.When D.that
It is a job _________ you are doing something serious but interesting.不是强调句，A job you are doing something serious but interesting不是一个正确的句子，答案是where在后面从句中作状语。意思为：你在这分工作中做一些严谨但却有趣的事。