--- I am out of breath. I can’t go any further.
--- ! I am sure you can make it.
A. No problem
B. What a pity
C. Not bad
D. Come on
网友回答
A. No problem
B. What a pity
C. Not bad
(答案→)D. Come on
解析：No problem 没问题；what a pity 太可惜了；Not bad还不错；Come on开始，来吧。句意：我喘不过气来了。我不能再走了。联系下文，我相信你没问题的。可知选D。