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
Tom was tired.He _______ all day.A was working B.has worked C worked ,Dhad been working
Tom was tired.He _______ all day.A was working B.has worked C worked ,Dhad been working
分析一下原因
分析一下原因
英语人气：444 ℃时间：2020-04-04 03:27:39
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