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I sometimes help my mom with her housework____________ Saturdays.
#45850
A
at
B
in
C
on
D
to
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____ the end, they arrived in the city ____the morning of June 20, 2005. 
#47292
A
in; at
B
By; on
C
At; in
D
In; on
China lies _____ the east of Asia and _____ the north of Australia.
#49974
A
to；to
B
in；to
C
to；in
D
in；on
It’s bad for your health to go to work ______ breakfast.
#47324
A
without
B
at
C
in
D
with
He has got a chair to sit _____ , but nobody to talk _____.
#48194
A
on; to
B
/; with
C
on; /
D
/; to
The girl ____ red is my sister.
#46598
A
on
B
in
C
of
D
over