----- Nội dung dịch tự động từ ảnh ----- A. finish B. finishes C. finished 21. When I walk past the park, I saw some children play football. A B D 22. After John çaten dinner, he wrote several letters and went to bed A B C D 23. What did you do at 9 o'clock last night? I phoned you but nobody A 13 C D 24. When I arrived at the station, the train has already left. A B C D 25. She has disappeared three days ago, and they are still looking for he B C D D A 26. After Mrs. Wang had returned to her house from work, she was cookin A B C 27. It's the first time I saw this film A B CD 28. After he graduates from university, he joined the army. B C D