◎ 题干
—Who telephoned you just now?
— don’t know. I was about to answer the phone when it ________.
A.rang upB.rang offC.hung onD.rang back
◎ 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“—Who telephoned you just now?— don’t know. I was about to answer the phone when it ________.A.rang upB.rang offC.hung onD.rang back…”主要考查了你对  【动词短语】【动词】  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。