I know a lot about the gentleman, ____________ this expensive watch belongs.
#33401
A
on whom
B
to whom 
C
about whom
D
for whom
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________, the car stopped all at once.
#31625
A
Seeing a boy lying on the ground
B
On seeing a boy sitting on the road
C
The driver saw a boy standing on the road
D
The minute the driver saw a boy seated on the road