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By nine o’clock yesterday evening, we ______ our work.

A．have finished	B．finished
C．had finished	D．finish

【答案】

【解析】此題考查動詞的過去完成時的基本用法，表示在過去的某一時間以前完成的動作，基本結構為had+動詞的過去分詞。

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