_________, 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
.If the car won’t start, _____ it. 
#66315
A
try push
B
try pushing
C
to try pushing
D
to try to push
   me again before coming.
#66222
A
Calling
B
To call
C
Do calling
D
Call
---Jim, ______ miss the first bus.----OK, I_____.
#59373
A
don’t, will
B
doesn’t, will
C
don’t, won’t
D
doesn’t, won’t