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《Unit Three Science and Technology Lesson 3 Owning a Car》优质教学课件（新世纪版）
become lower
Metro;
subway
go on
make sth.
shorter
on time
smart
intelligent
travel
regularly
a long distance
from home to
work
because of;
due to
come down
underground
continue
shorten
punctually
wise
commute
thanks to
Spell the words or expressions according to the English meaning