第189页

信息发布者：
I calmed down after listening to the beautiful music.
We should obey the traffic rules to stop traffic accidents (from) happening.
He was late for the meeting because his car broke down on the way.
We all think that terrible weather sometimes may/can cause natural disasters.
making
hit
busy
heavily
to have fun
safer
building
a
with
will protect
happens
heavy
quickly
to leave
until
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