11.   The bubbles always appeared on the same side of the vehicle and always on those made by the night shift.

n. + appear >>共 1545
man 1.42%
government 1.09%
side 1.01%
name 0.98%
official 0.98%
investor 0.88%
attack 0.71%
leader 0.59%
report 0.59%
move 0.59%
bubble 0.04%
bubble + v. >>共 112
burst 34.35%
be 11.76%
form 2.82%
appear 2.59%
have 2.59%
rise 1.88%
pop 1.65%
begin 1.65%
come 1.41%
burst_in 1.18%
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