◎ 题干
— I'm going to the U.S.A.
— How long _____ you _____ there?

A. have; stay
B. are; stayed
C. are; staying
D. do; stay
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— I'm going to the U.S.A. — How long _____you _____there? [ ]A. have; stay B. are; stayed C. are; staying D. do; stay …”主要考查了你对  【现在进行时】  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。