◎ 题干
— How long _____ at this job?
— Since 1990.
A. were you employed
B. have you been employed
C. had you been employed
D. will you be employed
◎ 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“— How long _____ at this job?— Since 1990. [ ]A. were you employed B. have you been employed C. had you been employed D. will you be employed …”主要考查了你对  【现在完成时的被动语态】  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。