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【一诺留学】ACT真题练习（三十三）

　　Modern broadcasting began to develop afterthe First World War. Before 1920, radio was simplya useful way to send electrical signals ashore from aship at sea, or, from one "ham" operator to another.The new technology associated with movies andairplanes was already developing rapidly by the timesoldiers started returning from European trenches　in 1918. The vast potential of the airwaves, therefore,　had scarcely been touched.

　　[2]

　　[1] Then a vice president of Westinghouse,looking for a way to make the transmission of radiosignals more profitable, decided on a two-foldstrategy. [2] First, he would entice an audience withdaily programming of great variety. [3] Second, hewould sell this audience the radio receivers necessaryto listen to this entertainment. [4] The plan succeededbeyond anyone's expectations.

　　[3]

　　The federal Radio Division in Washington, D.C.,was created to license stations, because it had nopower to regulate them. Broadcasters multipliedwildly, some helping themselves to the more desirablefrequencies, others increasing their transmissionpower at will. Chaos means things were out of control.

　　[4]

　　Yet even in the midst of such anarchy,some commercial possibilities and organizations saw clearly of a medium whose regulation seemedimminent. In 1926, RCA paid the AmericanTelephone & Telegraph Company one million dollarsfor station WEAF in New York City—and NBC was born. Years later, the Radio Law of 1927 was enacted. It authorized it's control for licensing and of policing the broadcasters.

　　[5]

　　The RCA executives who created the powerful NBCnetwork were right to see that sizable profits would come from this new medium.Even in 1930 for example an hour's advertising on nationwide radio to forty-seven cities cost $10,180.

　　Advertising turned broadcasting into an industry,and the untapped potential of the airwaves began to be realized.

　　Choose the best alternative for the underlined part 9.

　　A. NO CHANGE

　　B. A year later,

　　C. Factually,

　　D. In conclusion,

　　答案：B

　　【解析】The best answer is B, which proposes the most logical transitional phrase to connect this sentence with the preceding one. The other choices are either illogical or create poor transitions. Choice A would only confuse the reader because the Radio Law of 1927 did not occur "years later"; it occurred just one year later. Choice C does not logically connect the two sentences. Choice D is also illogical because a conclusion is not being made at this point in the essay.

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