_________, I think, and the problems would be settled.
#66166
A
If you double your efforts
B
Making more efforts
C
So long as you don’t lose heart
D
A bit more effort
推荐题目
__it is for us to see that he does his work so well! 
#66279
A
What surprise
B
How surprise
C
What a surprise
D
How a surprise
______ the road and you’ll see the hospital.
#59442
A
Crossing
B
Walk cross
C
Across
D
Walk across