The policeman is helping the old woman __________ a heavy bag on her back.
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A
in
B
with
C
at
D
on
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_____Hepburn’s acting years, she insisted _______ working closely with UNICEF. 
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A
Though, to
B
Throughout, to
C
Throughout, on
D
Throughout, onto
 The best way to the park is ______________.
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A
by bus
B
ride a bike
C
take the bus
D
on bike