Mr Smith sold that magnificent cottage of his on the sea ________ 2,000,000 dollars. 
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A
at
B
for
C
to
D
by
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His job at the hospital did not pay much, so he found another _____.
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A
on the rise
B
on the spot
C
on the decline
D
on the side
I have offered to paint the house __________ a week’s accommodation.
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A
in exchange for
B
with regard to
C
by means of
D
in place of