◎ 题干
— What are they doing?
— ___________________

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A. They are singing.
B. This is Jenny's family.
C. She is standing.
◎ 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“— What are they doing? — ___________________[ ]A. They are singing.B. This is Jenny's family.C. She is standing.…”主要考查了你对  【特殊疑问句】  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。