◎ 题干
I became a student ten years      . I have been a student           1996. I have studied here            about 10 years.
A.ago, since, forB.ago ,for ,since,
C.ago, before, forD.ago, in, after
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“I became a student ten years. I have been a student 1996. I have studied here about 10 years.A.ago, since, forB.ago ,for ,since, C.ago, before, forD.ago, in, …”主要考查了你对  【助动词】【介词短语】【固定搭配】【疑问词组】  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。