◎ 题干
I'm so glad to see you back, Lucy. How long _____ at your grandma's?

[     ]

A. had you stayed
B. did you stay
C. have you stayed
D. do you stay
◎ 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“I'm so glad to see you back, Lucy. How long _____ at your grandma's?[ ]A. had you stayed B. did you stay C. have you stayed D. do you stay …”主要考查了你对  【现在完成时】  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。