◎ 题干
Our math teacher ______ in our school for 20 years and he _____ here when he was 23 years old.
A.has taught, has comeB.taught, comes
C.taught, cameD.has taught, came
◎ 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“Our math teacher ______ in our school for 20 years and he _____ here when he was 23 years old.A.has taught, has comeB.taught, comesC.taught, cameD.has taught, c…”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。