单选题
A．It was no longer possible to keep horses.
B．It was difficult to find jobs.
C．They could no longer walk to work.
D．They had to pay more for their housing.
According to the professor, what problem did many people face as cities grew larger?
细节题。根据Growth obviously meant greater distances between people’s home and their work places．People could no longer rely on walking．可知城市的扩大意味着家和公司之间的距离加大，人们再也不能走路上班了。因此，正确答案是C。
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1
A．They could be controlled independently.
B．They were fire resistant.
C．They could keep operating for a longer period of time.
D．They offered more room for passengers.
2
A．It made the subways much quieter.
B．It brought electric light to the tunnels.
C．It allowed passengers to breathe cleaner air in the tunnels.
D．It allowed subways to be repaired inexpensively.
3Questions are based on the following passage.
The American 26 system, is organized around a basically private-enterprise, market-oriented economy in which 27 largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most. Private businessmen,28 to make profits, produce these goods and services in 29 with other businessmen; and the profit motive, operating under competitive pressures, largely determines how these goods and services are produced.Thus, in the American economic system it is the demand of individual consumers,30 with the desire of businessmen to 31 profits and the desire of individual to maximize their incomes, that together determine what shall be produced and how resources are used to produce it.
An important factor in a market-oriented economy is the 32 by which consumer demands can be expressed and responded to by producers. In the American economy, this mechanism is provided by a price system, a process in which prices rise and fall in 33 to relative demands of consumers and supplies offered by seller-producers. If the product is in 34 supply relative to the demand, the price will be bid up and some consumers will be eliminated from the market. If, on the other hand, producing more of a commodity results in reducing its cost, this will tend to increase the supply offered by seller-producers, which in turn will lower the price and permit more consumers to buy the product. Thus, price is the 35 mechanism in the American economic system.
A. Competition
B. maximize
C. short
D. coupled
E. individual
F. response
G. Eliminated
H. private
I. economic
J. Striving
K. regulating
L. mechanism
M. Consumers
N. political
O. Results
第（26）题选
