CÂU 8. CHUẨN NGHỀ NGHIỆP GIÁO VIÊN THCS, GIÁO VIÊN THPT BAN HÀNH KÈM T...

12. - DE HD CHAM BAI KIEM TRA KIEN THUC GV TIENG ANH 2013
DE HD CHAM BAI KIEM TRA KIEN THUC GV TIENG ANH 2013

12. We sat at the table until all the food …

A. were eating B. was eating C. were eaten D. was eaten