----Why do you always sleep ________?----Because I’m afraid of the dark. 
#47797
A
by yourself
B
with the door open
C
with the window open
D
with the light on
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Noise pollution was a serious problem here      .
#48147
A
in the past
B
in the future
C
since then
D
once a week
I go home __    __5:30       Sunday afternoon.
#47861
A
at; on
B
at; in
C
at ;at
D
in;/
She is short, so she sits       the classroom.
#49589
A
next to
B
in front of
C
in the front of
D
at the back of