_____, I think, and the problems could be settled.

A. A bit more efforts　　　　

B. Making greater efforts

C. If you double your efforts　

D. So long as you make more efforts

_____, I think, and the problems could be settled.

A. If you double your efforts         B. So long as you keep up your spirits

C. Making greater efforts            D. A bit more efforts

_____,I think , and the problems could be settled .

       A.If you double you  efforts  B.So long as you keep up your spirts 

       C.Making greater efforts   D.A bit more efforts   

19. _____, I think, and the problems could be settled.

A. If you double your efforts

B. So long as you keep up your spirits

C. Making greater efforts

D. A bit more efforts

_____, I think, and the problems could be settled.

A. If you double your efforts

B. So long as you keep up your spirits

C. Making greater efforts

D. A bit more efforts