(Viên chức Mầm non) 30 đề ôn thi tiếng Anh có đáp án - Phần 23

He was born on this farm sixty-eight years (18) ______ .

18/30

He was born on this farm sixty-eight years (18) ______ .

then

before

ago

since then

Giải thích

Chọn đáp án C