—Guess, how much does it cost?—I think it costs       15 and 20 dollars. 
#50233
A
from
B
between
C
among
D
with
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Lucy met her mother in the park by chance.
#48201
A
with accident
B
by accident
C
by mistake
D
by opportunity
Sam sits_______ Kitty." Which is wrong(错误的)?
#46568
A
behind
B
between
C
next to
D
in front of