I________ MY HOMEWORK AT 7 P.M YESTERDAY. A. DOING B. HAD DONE C....

28) - DE KIEM TRA HKI 20112012
Tiếng Anh DE KIEM TRA HKI 20112012

28) I________ my homework at 7 p.m yesterday.

A. doing

B. had done

C. was doing D. did