_________, 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
The teacher often says, “ _____ late for class.”
#59341
A
Don’t
B
Don’t be
C
Not be
D
Doesn’t
____the speed limits, or you’ll get fined $ 200 for speeding.
#65971
A
If you don’t keep to
B
Keeping to
C
To keep to
D
Keep to
_____ through this book and tell me what you think of it. 
#66199
A
Look
B
Looking
C
To look
D
Having looked
   picture it is!
#66239
A
What wonderful
B
How a wonderful
C
What wonderful a
D
How wonderful a