◎ 题干
Lisa, now stop for a short break. You should know that you _____ all the morning.
[     ]
A. are working
B. had been working
C. have been working
D. have worked
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Lisa, now stop for a short break. You should know that you _____all the morning. [ ]A. are working B. had been working C. have been workingD. have worked …”主要考查了你对  【现在完成进行时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。