Câu 12 nhá ----- Nội dung dịch tự động từ ảnh ----- coaching for this electronics firm in I 11. How long have you studied English? When did you begon studions Anglish? 12. When did you begin to do research on lung cancer? How long TH2: Nhận biết: last↔haven’t/ hasn’t Stopped → haven't/hasn't 1.She last swam in the river 3 years ago. → She hasn't written to me for three 2.1 last visited the city museum 5 years ago. →I haven't visited fro aty museum for 3. I haven't attended the club Since 1988. →I last_aftended the club in 1988 4. She hasn't seen him for 2 months.