题目内容：

()before we deaprt the day after tomorrow,we should have a wonderful dinner party
1had they arrived
2were they to arrive
为什么选2

优质解答

这是虚拟语气的倒装形式1 即为if they had arrived.2 为 if they were to arrive.1 条件中用had done 形式,可知是对过去情形的虚拟语气2 中were to do 是对未来情形的虚拟语气由题中,the day after tomorrow后天 可...