Mark the letter A, B, C, or D on your answer sheet...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Their children felt disappointed because first they promised to take them to Ha Long Park and then they________their word.

A. played down on

B. drew out on

C. went back on

D. came off with