完形填空 Business is the organized effort of individuals to produce and sell, for a profit, the goods and services that (0) society''s needs. Four kinds of resources—material, human, financial, and informational—must be (21) to start and operate a business. The three general types of businesses are manufacturers, service businesses, and marketing middlemen. Profit is what remains after all business expenses are (22) from sales revenue. It is thus the payment that business owners receive for (23) the risks of business primarily the risks of not receiving payment and of losing whatever has been (24) in the firm. Most often, a business that is operated to satisfy its customers earns a reasonable profit. By studying business, you can become a more (25) consumer and investor and be a better employee. And with a working knowledge of business, you may decide to open your own business. Since its beginnings in the seventeenth century, American business has been based on private ownership of (26) and freedom of enterprise. And from this beginning, through the Industrial Revolution of the early nineteenth century, to the (27) expansion of American industry in the nineteenth and early twentieth centuries, our government (28) an essentially laissez-faire attitude toward business. However, during the Great (29) of the 1930s, the federal government began to provide a number of social services to its citizens. Government''s role in business has expanded (30) since that time. A. please B. gratify C. content D. satisfy EXAMPLE：The correct answer for blank (0) is A.