The doctor said jokingly that his own infection of the virus _______ the discovery of a vaccine (疫苗)of the disease.
#76217
A
stood for
B
called for
C
paid for
D
contributed to
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Sam ________ some knowledge of the computer just by watching others working on it.
#65449
A
brought up
B
looked up
C
picked up
D
set up
---Oh dear, why are you killing time this way? ---I can’t find anything worth ___________.
#64316
A
of being done
B
being done
C
doing
D
to do
Don’t eat too much chocolate, or you can ______ weight quickly.
#77923
A
put into
B
put out
C
put up
D
put on
Hardly could Tom _____ this amount of homework in such a short time.
#71942
A
get down
B
get into
C
get off
D
get through