Charlie said, "I haven't seen Bill for a while".4/20Charlie said, "I haven't seen Bill for a while".He said that he hadn't seen Bill for a while.He said that I haven't seen Bill for a while.He said that he hasn't seen Bill for a while.He said that I hadn't seen Bill for a while.Giải thíchĐáp án đúng: A Dịch: Anh ấy nói rằng anh ấy chưa gặp Bill được một khoảng thời gian rồi.