问题补充：
, 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
答案：
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：句意，再努力点，我认为，问题就可能被解决。If you don’t doubt your efforts如果你不怀疑你的努力So long as you keep up your spirits只要你振作精神Making great efforts作出努力A bit more efforts再努力点，根据题意，故选D。
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