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