, I think, and the problem could be settled.
A. If you don’t doubt your efforts
B. So long as you keep up your spirits
C. Making great efforts
D. A bit more efforts
网友回答
A. If you don’t doubt your efforts
B. So long as you keep up your spirits
C. Making great efforts
(答案→)D. A bit more efforts
解析：考查祈使句。A bit more efforts 这里是祈使句，“只要再多一点努力”and这里是并列连词，用来连接另一句句子the problem could be settled soon，选D。