根据以下内容回答题:Cotton,like silk,was discovered and made cloth by man before the histor
Cotton is the most important of all textiles.Even now,with many artificial materials(80),more than half of all textile products are.made of cotton.
Cotton comes from a plant of that name.When the plant is mature,the cotton grows in a white ball around the seed.To(8 1)the cotton for market,the seed must be removed from the cotton fiber.This(82)by a machine called the cotton gin.Then the cotton is packed into huge bundles called bales,(83)are sent to the mills.There the fibers are combed(84)they will all be turned in the same direction.Next,the fibers are spun into thread.From the thread,the+cotton is w6ven into(85).
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A.begins
B.has begun
C.began
D.was begun