It’s impolite ___ you to ask one’s private affairs.
#28094
A
for
B
of
C
to
D
on
推荐题目
No one helped me . I did it all _____ myself 
#29159
A
for
B
by
C
from
D
to
It may rain --- you’d better take an umbrella _______.
#26630
A
in case
B
in this case
C
in no case
D
under the case