.Jenny, your paintings are wonderful. I _____ you learned to paint.
#4747
A
hadn’t known
B
didn’t know
C
won’t know
D
haven’t known
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They arrived at the farmhouse, in front of which _________.
#4812
A
is sitting a boy
B
sat a boy
C
a boy sat
D
a boy is sitting
He threw away all the ______ cigarettes, _______ to give up smoking for the sake of his health.
#4651
A
remained; determining
B
leaving; determined
C
remaining; determined
D
left; determining
.The horses________each other________the first prize in the match. 
#4781
A
competed against; for
B
competed against; to
C
completed against; for
D
completed; to get