◎ 题干
Liu Ming is said         abroad for one year before he came to teach in our school.
A.to have studiedB.to study
C.to be studyingD.to have been studying
◎ 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“Liu Ming is said abroad for one year before he came to teach in our school.A.to have studiedB.to studyC.to be studyingD.to have been studying…”主要考查了你对  【一般现在时】【将来进行时】【过去完成进行时】【过去将来时的被动语态】  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。