Please          . The boy is studying.
#59398
A
not noisy
B
don’t noisy
C
not to be noisy
D
don’t be noisy
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     , and the problem will be worked out.
#66110
A
If you have a bit more effort
B
Having a little effort
C
A bit more effort
D
There being a little effort
______ left when you get to the end of the street. 
#66195
A
Keep
B
Keeping
C
To keep
D
Kept
--- Father, I’m going out for a play. ---- _________ be long!
#66252
A
Don’t
B
It won’t
C
Won’t
D
You didn’t