Mary, I John of his promise to help you.
A. told
B. reminded
C. warned
D. advised
网友回答
A. told
(答案→)B. reminded
C. warned
D. advised
解析：句意，玛丽，我提醒了约翰他要帮你的诺言。remind sb.of sth.“使某人想起某事或提醒某人做某事”，符合语境，故B项为正确答案。warn sb.of sth.警告某人某事；advise sb.of sth.“通知/(正式)告知某人某事”，相当于tell sb.about sth.。