CHỌN ĐÁP ÁN ĐÚNG (ỨNG VỚI A, B, C HOẶC D )ĐỂ HOÀN THÀNH CÁC CÂU SAU

Question

32. When you phone me, I...my homework. A. was doing B. did C. am doing D. have done

Answer

A. was doing B. did C. am doing D. have done