People walk ________ of the street in China.
#48721
A
on the left
B
on the right
C
in the middle
D
on the left of
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There is a big tree ________ the classroom.
#48535
A
in front of
B
at the front
C
in the front of
D
in front
It’s thoughtful ________you to prepare the film________ for our show. 
#48177
A
for, in the 1960s
B
of, in the 1960
C
for, in 1960s
D
of, in the 1960s
I often go to sleep ________10:00 p.m. ________7:00 a.m..
#49545
A
at, at
B
at, and
C
between, and
D
from, to