—Come on baby! You will succeed. We all wish to get good news.— but I'll do my best.A. No

问题补充：

—Come on, baby! You will succeed. We all wish to get good news.

— but Ill do my best.

A. No problem

B. It is impossible

C. I can promise

D. Don worry

答案：

A. No problem

B. It is impossible

(答案→)C. I can promise

D. Don worry

解析：C考查交际英语。由答语后面的“我会尽力的”可知，前面选C，意为“我不敢打包票”。