—— 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过去的动作一直持续到现在。 “汤姆，你的衣服这么脏！”“我一直在打扫楼下的储藏间”