Noise pollution was a serious problem here      .
#48147
A
in the past
B
in the future
C
since then
D
once a week
推荐题目
There is an old bridge ____ the river.   
#50109
A
above
B
in
C
over
D
on
Leaves fall _______piles ________the ground
#46979
A
into; upon
B
upon; into
C
onto; off
D
into; onto
 Mike was born ____ February, 2005.
#48345
A
of
B
in
C
on
D
at
Mary often studies English by _______ with a group.
#49704
A
working
B
work
C
to work
D
worked