单选题You look so tired to

问题补充：

单选题Youlooksotiredtonight.Itishightimeyou_________.A.went to bedB.went to sleepC.go to bedD.to sleep

答案：

A解析本题是虚拟语气的考查。It is（hi曲）time that后接的从句中谓语动词需用过去式。go to bed是固定用法。