, I think, and the problem could be settled.
A. A bit more effort
B. So long as you keep up your spirits
C. If you doubt your efforts
D. Making great efforts
网友回答
(答案→)A. A bit more effort
B. So long as you keep up your spirits
C. If you doubt your efforts
D. Making great efforts
解析：考查动词形式。本题考查祈使句 + and + 陈述句，题中用省略，故A bit more effort = Make A bit more effort。选A。