The problem is which one you want to choose

问题描述:

The problem is which one you want to choose
上面的句子对吗?那么下面的句子呢?this factory is which some foreign friends visited last Friday.
this factory is which some foreign friends visited last Friday 那这句话对吗?

上面的句子是对的.下面的句子应该是this factory is where(或者 in which ) some foreign friends visited last friday.
上面那个句子就是which引导表语从句.