—— Why? Tom, your shirt is so dirty! —— Mum, I ＿＿＿＿＿ my storeroom downstairs。A. cleanedB.

发布时间：2020-08-17 12:57:27

—— Why? Tom, your shirt is so dirty!
—— Mum, I ＿＿＿＿＿ my storeroom downstairs。
A. cleaned
B. have worked
C. was cleaning
D. have been cleaning

网友回答

A. cleaned
B. have worked
C. was cleaning
(答案→)D. have been cleaning
解析：现在完成进行时表示从过去某时到现在一直在进行的动作。
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