◎ 题干
—The two old friends were ____ busy ____ with each other that they forgot the time.
—Yes. They hadn’t met for over ten years, so they kept talking the whole night.       
A.too, to talk B.too, talkingC.so, to talkD.so, talking;
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“ —The two old friends were ____ busy ____ with each other that they forgot the time.—Yes. They hadn’t met for over ten years, so they kept talking the whole n…”主要考查了你对  【助动词】【介词短语】【固定搭配】【疑问词组】  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。