◎ 题干
— Where are the twins?
— I think they _____ Hangzhou. They _____ there twice before.

[     ]

A. have been to; has gone to
B. have gone to; have been
C. have been to; have been to
D. have gone to; have gone
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Where are the twins? — I think they_____ Hangzhou. They_____ there twice before. [ ]A. have been to; has gone to B. have gone to; have been C. have bee…”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。