He last visited London three years ago. A. He has been in London for three years. B. He hasn't visited London for three years. C. He didn't visit London three years ago. D. He was in Lond54/147He last visited London three years ago.He has been in London for three years.He hasn't visited London for three years.He didn't visit London three years ago.He was in London for three years.Giải thíchChọn B