组卷网 > 高中英语综合库 > 单词辨析 > W > work(奏效;起作用)
题型:单项选择 难度:0.65 引用次数:131 题号:18719918
You ____________________ (work) on the computer for three hours and you should stop to take a break now.
A.workedB.was workingC.have been workingD.was worked

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