Question

The schools themselves admit that not all children will be successful in the jobs ( )they are being

The schools themselves admit that not all children will be successful in the jobs ( )they are being trained.
A.in that B.for that C.in which D.for which
为什么用D不用B that与which有什么区别？ 在定语从句中什么时候只用that 什么时候用which什么时候都可以用？

Answer 1

前面有介词，不用that

我认为意思上两者是没区别的，但就是用法习惯上有区别。以下是摘自百度百科“定语从句”的，应该说全了

一，只用that不用which的情况
　　1）当先行词是或被序数词，最高级，不定代词修饰时，关系词用that不用which。 　　2）当先行词既有人又有物时，用that。 　　3）当先行词带有the only,the very,the same,the last,the one等词时，用that不用which。 　　4）当主句中有who或which时，为避免重复用that。
只用who不用that
　　如果先行词是those,they,all,persons,people,he,anyone,one时用who不用that。
二，只用which不用that
　　1）当主句先行词后有介词时，用which。2）非限定性定语从句，用which。