Pleasant music is often played ________ classes to make students  refreshed and relaxed for a while.
#26221
A
after
B
between
C
among
D
over
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His father had only a little money left ___ every month.
#28054
A
in the end
B
to the end of
C
at the end of
D
at last
She was told to wear flat shoes        her back problem.
#26206
A
on account of
B
regardless of
C
in terms of
D
in case of