EXERCISE 3I. CHỌN TỪ/ CỤM TỪ THÍCH HỢP (ỨNG VỚI A, B, C, D) ĐỂ HỊAN TH...
38. We had to write the letter before we got our money back. A. The letter we wrote before gave us the money. B. We had to write the letter when our money was lost. C. Only after writing the letter did we get our money back. D. Before writing the letter, we got our money back.