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【题目】 Why are your hands that dirty?

Oh, I______ in the garden since we finished breakfast.

A. worked B. was working

C. am working D. have been working

【答案】D

【解析】

试题分析:考查动词时态。句意:你的手为什么这么脏?哦,我们吃完早餐我就在花园里忙碌了。这个时间是从过去到说话之前一直在干某件事,是延续性的,用现在完成进行时,故选D项。

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