WHY ARE YOUR HANDS SO DIRTY

28. - File thứ 5: de_va_dap_an_45_phut_so_3_lop_11_sach_moi_311201817
File thứ 5: de_va_dap_an_45_phut_so_3_lop_11_sach_moi_311201817

28. Why are your hands so dirty? - I _______ my bike.

A. has been repaired B. have repaired C. repaired D. have been repaired