----- Nội dung ảnh ----- ``` III. Rewrite these sentences . 1 .My sister began to learn English when she was six years old. => My sister has _______________. 2. I last saw Peter when he attended the school meeting. => I haven’t _______________. 3. Mr.Quyen began teaching Chinese ten years ago. => Mr.Quyen has _______________. 4. He has been studying English for six years. => He started _______________. 5. It’s nearly twenty years since my father last saw his brother. => My father hasn’t _______________. 6. He started learning Chinese five years ago. -> He has _______________. ```