Tom was tired.He _______ all day.A was working B.has worked C worked ,Dhad been working

问题描述:

Tom was tired.He _______ all day.A was working B.has worked C worked ,Dhad been working
分析一下原因

选D
句意:Tom很疲劳,他持续工作了一整天.
have/has been doing sth.持续不间断的做某事