YOU LOOKED VERY BUSY WHEN I SAW YOU LAST NIGHT. WHAT ____ YOU____

41. - File thứ 1: anh11new_231201916
File thứ 1: anh11new_231201916
41. You looked very busy when I saw you last night. What ____ you____?A. were___ doing B. are ___ doing C. had ___ done D. have___ done