◎ 题干
—Why are you so happy, today?
—Because I                    to London with my parents tomorrow.
A.flyB.flewC.am flyingD.have flown
◎ 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“—Why are you so happy, today? —Because I to London with my parents tomorrow.A.flyB.flewC.am flyingD.have flown…”主要考查了你对  【一般现在时】【过去进行时】【过去完成进行时】  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。