OUR TEACHER CAME IN WHEN WE _______________ EXERCISES QUIETLY. A. H...

Tiếng Anh KIỂM TRA HỌC KÌ II 2010 2011 MÔN TIẾNG ANH 12 – MÃ ĐỀ 365 POT

6. Our teacher came in when we _______________ exercises quietly. A. had done B. were doing C. are doing D. have been doing