Celluloid and plastics have largely replaced genuine ivory in the manufacture ……… buttons, billiard balls, and piano keys.
In so-called nonfiction novels, a documentary style is combined with fictional techniques ……… actual events and people.
Although Margaret Mead had several assistants during her long investigations of Samoa, the bulk of the research was done by ……… alone.
Although Margaret Mead had several assistants during her long investigations of Samoa, the bulk of the research was done by ……… alone.
In order to remain in existence, ……… must, in the long run, produce something consumers consider useful or desirable.
In that case he'll have to look for a new job .......
The versatility of modern cross-country skiing equipment allows skiers ……… technique to diverse terrain.
……… their differences, the three models resemble ……… in a crucial respect.
Medical research at the cellular level, ……… research on the immune system, has been made possible through twentieth-century advances in techniques of genetic research.
Thirty-eight national sites are known as parks, another eighty-two as monuments, and ………