HÃY CHỌN MỘT ĐÁP ÁN ĐÚNG NHẤT (A, B, C HOẶC D) CHO MỖI CÂU SAU

96. - ON THI TRAC NGHIEM TIENG ANH 12BAM SAT
ON THI TRAC NGHIEM TIENG ANH 12BAM SAT

96. Sorry. I can’t go there with you now. I _________ my homework at present.

A. did B. do C. was doing D. am doing