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He was maths when I entered his room.A.working hard atB.working at hardC.work hard onD.worked at

编辑:chaxungu时间:2026-04-24 12:58:52分类:高中英语题库

He was ______maths when I entered his room.
A.working hard atB.working at hardC.work hard onD.worked at在线课程A
work hard at努力学习。