WHAT ____ HE ____ AT 4PM LAST SUNDAY

51) - TÀI LIỆU BO DE TRAC NGHIEM ON THI VAO 10
TÀI LIỆU BO DE TRAC NGHIEM ON THI VAO 10
51) What ____ he ____ at 4pm last Sunday?A. did/do B. was/do C. had/done D. was/doing