请教一道语法

yulongdaxia

Altough it is (any longer) the business that (it was) in the forties, radio (continue to be) a medium of essential commnication, especially at the (local level)

我知道any longer是不对，应该是no longer
可是难道B对吗？如果是定语从句就不应该有it，难道that可以引导状语从句，当when用？

chipmunk

Is it a objective clause?

nanfengcheng

应该是引导定语从句。that是指business. it 指的是radio.
不过我也不是很确定拉~

nanfengcheng

因为主语是radio. although 后面的it 和 that 后面的 it 都是指radio.
不过我还不是那么确定。。