假如我是班长作文200字:I first met Mary three years ago when we( ) in a middle school together.

来源：百度文库编辑：高校问答时间：2024/04/29 22:23:57

选择[a]hae worked [b]had been working [c]were working [d]had worked

请选择,并说明理由为什么选

选C
when引导瞬间时间状语
不可用完成时
所以只能用过去式，或过去进行时

C 是瞬间动作。
其它选项都是完成时，不合适。

“我第一次见玛丽是三年前我们同在一所中学教书的时候。”

选D
句中没有可以用进行时的状语，排除B和C，主句用过去时，从句的完成时也只能用过去完成时。

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