—Where’s your mother ? --She has gone shopping with my aunt . She’ll be back ________.
#50985
A
in a while
B
for a which
C
once in a while
D
a while
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Books are helpful _____ us.
#50001
A
from
B
on
C
in
D
to
Please open a window _________ turning on air conditioning.
#47107
A
instead of
B
instead
C
not
D
rather
He is one of_______in China.
#48813
A
the great scientist
B
the great scientists
C
the greatest scientist
D
the greatest scientists
_________ the money that Mr Brown_________,poor Mary could go back to school again. 
#51296
A
In; offered
B
With; offered
C
In; was offered
D
With; was offered