I would rather he ____at home now.A were B who C has been Dwas 既然用虚拟语气 A和D中选哪个?

问题描述:

I would rather he ____at home now.A were B who C has been Dwas 既然用虚拟语气 A和D中选哪个?
参考答案只选了个D ,B为什么不行?
我说错了是A为什么不行?

A在虚拟中BE动词只能用WERE ,没WAS 这种形式