In fact , the old couple looked forward every week      their grandson .
#92946
A
to see
B
to seeing
C
see
D
seeing
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      good manners to say “Sorry” when you knock into someone but    no need to say it again and again .
#92894
A
There are ; there is
B
It is ; there is
C
There is ; it is
D
It is ; it is
____some doubt among scientists about the cause of cancer.
#92930
A
It exists
B
There exists
C
There is existing
D
It is existing