I can't _____ you that I'll be able to come, but I'll do my best

I can't _____ you that I'll be able to come, but I'll do my best.
A、promise
B、ask
C、answer
D、advise
【正确答案】：A
【题目解析】：本题考查动词辨析。句意：我不能承诺我一定会来，但是我会尽量来的。promise意为“承诺，许诺”；ask意为“询问，请求”；answer意为“答复，解答”；advise意为“建议，提议”。故A正确。