I am not sure if you in the exam, but you will be better if you harder.
A. succeed; work
B. succeed; will work
C. will succeed; work
D. success; would work
网友回答
A. succeed; work
B. succeed; will work
(答案→)C. will succeed; work
D. success; would work
解析：句意：我不确信你是否能通过考试，但是如果你努力学习你会做得更好。结合语境可知前文描述的是将要发生的动作，故用将来时态。下文从句描述的是客观的动作，故用一般现在时态。选C。