◎ 题干
Jack’s mother was twenty-seven when he was born. Jack is eleven this year. How old is his mother?
A.56 B.49 C.38 D.40
◎ 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“Jack’s mother was twenty-seven when he was born. Jack is eleven this year. How old is his mother?A.56B.49C.38D.40…”主要考查了你对  【基数词】【序数词】【时刻】【分数】  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。