I HAD TO DO MY HOMEWORK. I COULD NOT HELP MY MOTHER WITH THE WASHING-U...

Câu 39:I had to do my homework. I could not help my mother with the washing-up.A.It was impossible for me to do my homework although my mother helped me with the washing-up.B.I could help my mother with the washing-up until I finished my homework.C.Because I was busy doing my homework, I could not help my mother with the washing-up.D.I could not do my homework because I had to help my mother with the washing-up.