264. The invention of the coal-burning_______engine revolutionized industrial production in the 18th century and opened the way to the development of mechanized transport by rail and sea.
The role of Chinese Dama in the economy has been over-estimated by some western media ______ their “gold rush” has had little influence on gold prices.
Two professors at Harvard University published a study of 3,300 new graduates, looking at ______ their names had any bearing on their academic performance.