分类：教育/科学-外语学习-英语考试
问题：一道音语题_____________,Ithink,andthe 
_____________,I think,and the blems could be settled. A.if you double your efforts B.so long as you keep your spirits C.a bit more efforts 注：请说明原因！多谢！
回答：_____________,I think,and the problems could be settled. 
A.if you double your efforts 
B.so long as you keep your spirits 
C.a bit more efforts 
选 c,I think是插入语,其后有and,所以排除A,B,因为A,B是条件句, 后边不能再 接and引导的并列句，
a bit more efforts 相当于A bit more effort is given
或Give a little mor effort的省略。
如： 
One more step and I'll shoot at you.
Hands up or I'll fire.