He has gone his promises so often that no one trusts him now.
He has gone________his promises so often that no one trusts him now.
A. back on
B. back
C. off
D. over
He has gone________his promises so often that no one trusts him now.
Đáp án. A
Giải thích: cấu trúc go back on (thất hứa).
Dịch nghĩa: Anh ta đã thường xuyên thất hứa đến mức bây giờ không còn ai tin tưởng anh ta nữa.