He said it was an accident but I know he did it on _______ . A. aim13/50Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. He said it was an accident but I know he did it on _______ . aim purpose goal reasonGiải thíchĐáp án B. - on purpose: cố ý - accidently = by chance = by accident: vô tình