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？