听力原文：As every schoolboy knows, the most important raw materials of industry are coal,

听力原文： As every schoolboy knows, the most important raw materials of industry are coal, oil and iron. But, as every business man knows, the most important real material of all is the school boy. Today U. S. industry is faced with a light shortage of such manpower, it needs not only more but better trained college graduates. To help get them, many a businessman believes that corporations must provide much of the cash needed by colleges to expand their facilities and improve their teaching, and work more closely with colleges on business needs. Industry and education have not always recognized this. While there're a few businessmen wire still regard college professors as fuzzy minded and likely to be radicals and a few educators who still look on businessmen as money- grabbers, the mutual distrust has generally disappeared in the mutual need. The rapidly expanding U. S. economy has made college graduates more important than ever to industry. In turn, universities must depend on corporations for contributions since high taxes have ill effect on the big individual contributions that built the private school.

(33)

A．Coal.

B．Labor.

C．Iron.

D．Oil.