Cotton, like silk, was discovered and made【61】cloth by man before the historical period【62
Cotton is the most important of【69】textiles. Even now, with many artificial materials【70】,more than half of all textile products are made of cotton.
Cotton comes【71】a plant of that name. When the plant is mature, the cotton grows in a white ball around the seed. To【72】the cotton for market, the seed【73】from the cotton fiber. This【74】by a machine called the cotton gin. Then cotton is【75】into huge bundles called bales,【76】are sent to the mills.【77】the fibers are combed【78】they will all be turned in the same direction.【79】, the fibers are spun into thread. From the thread, the cotton is woven into【80】.
(46)
A.into
B.out of
C.from
D.through