it's been.的全称是不是 it has been...

it's been.的全称是不是 it has been... IT的全称 IT的全称? IT的全称是什么 谁知道IT的全称? It's been awhile. it's been coverd.. IT的英文全称是什么? IT的英文全称是什么 谁知道IT的全称啊? It's been a while It's been so long It's been a long it's been a long It's has been accepted it's been是什么时态, It's been very informative 口语中的it's been