It might have saved me some trouble ______ the schedule.
- Adid I know
- Bhave I known
- Cdo I know
- Dhad I known
搜答案，更轻松！
It might have saved me some trouble ______ the schedule.
句意：如果我早知道日程安排，可能会省去我一些麻烦。根据题干中might have saved可知主句是对过去的虚拟，从句应用if I had known与主句保持一致。if虚拟条件句中含有had时，可将if省去，同时将had提前构成倒装结构。