He started working as an engineer 5 years ago. D. He has worked as an engineer for 5 years.Đoạn văn39/40He started working as an engineer 5 years ago.He worked as an engineer 5 years ago. He had worked as an engineer for 5 years.He didn't work as an engineer any more. He has worked as an engineer for 5 years.Giải thíchĐáp án D