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