I sometimes help my mom with her housework____________ Saturdays.
#45850
A
at
B
in
C
on
D
to
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Japan and other countries have taken action ________ prevent nuclear radiation (核辐射).
#48880
A
in order
B
in the order of
C
in order to
D
in order that
_____ a cold afternoon, he got to Zibo       his mother. 
#50676
A
On, by
B
In, with
C
At, by
D
On , with
 You should do your homework__ watching TV.
#47686
A
because of
B
instead of
C
instead
D
except