Question

2. ,I think,and the problem could be worked out.

   A. If you double your efforts

   B. So long as you keep your spirits

   C. A bit more efforts

   D. Making great efforts

Answer 1

2. C

2. C 解析：a bit more efforts 为 make a bit more efforts的省略形式。若D项 中的making改为动词原形则也正确。