Mary would never have gone to the party__that Tom invited her.A.had she known B.she knew C.she didn't D.she had known
问题描述：
Mary would never have gone to the party__that Tom invited her.
A.had she known B.she knew C.she didn't D.she had known
答
A.虚拟语气如果省去if就要用倒装句
答
A.had she known
never 否定词在前面,要倒装.