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
解析
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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
解析