【題目】— Has David finished his project yet?

— I guess not. He ________ on it at lunchtime. Do you want me to confirm it?

A. is working B. was working

C. has worked D. had worked

【答案】B

【解析】

試題分析：句意：--大衛(wèi)還沒有完成作業(yè)嗎?—我想沒有完成吧，他在午飯時間還在工作，你想要我證實一下嗎?根據(jù)I guess not. He on it at lunchtime可知他在午飯的時間正在做，故用過去進行時。故選B。

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