My mother started working as a teacher of Math twe...
Câu hỏi: My mother started working as a teacher of Math twenty years ago.
A My mother had worked with a teacher of Math for twenty years.
B My mother had been working as a teacher of Math for twenty years.
C My mother has worked with a teacher of Math for twenty years.
D My mother has been working as a teacher of Math for twenty years.
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Anh Trường THPT Đoàn Thượng - lần 1 - năm 2017( có lời giải chi tiết)