您现在的位置是:首页 > 学科知识查询 > 高中英语题库

I got up early this morning.but I so because I was not on duty today.A.mustn’t have done B.needn’t h

编辑:chaxungu时间:2026-04-27 03:00:14分类:高中英语题库

【题目】I got up early this morning,but I ________ so because I was not on duty today.

A.mustn’t have done B.needn’t have done

C.didn’t need to do D.can’t have done

在线课程

【答案】B

【解析】

试题分析:考查情态动词。句意:早晨我起得很早,但是我本没必要这么做,因为我今天不值班。needn’t have done本没必要做某事。故选B。