EXERCISE 3I. CHỌN TỪ/ CỤM TỪ THÍCH HỢP (ỨNG VỚI A, B, C, D) ĐỂ HỊAN TH...

48. By the time we finished our work, Peter had already gone home.A. Peter did not go home until we finished our work. B. As soon as we finished our work, we would go home with Peter.C. We finished our work before Peter went home.D. Peter had gone home before we finished our work.