虚拟语气
1.He is talking so much about America as if he ( )there
Ahad been B has been C was D has gone
2.What should we do if it ( )tomorrow?
A should snowB would snow C snow D will snow
3.You ( )such a serious mistake if you had followed his advice.
A shouldn't have made B might not have made
4.If it were not for the fact that you ( ) ill ,I would ask you to do this right now.
Awere B are
5.even if ,even though 引导的让步状语从句 怎么弄?