◎ 题干
--- Were you at school when he came to see you ?
---- Yes, I __________ a math class .
A. had           B. was having        C. am having
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“--- Were you at school when he came to see you ?---- Yes, I __________ a math class .A. had B. was having C. am having…”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。