2. 外语
  3. Most radio and television stations in the United States are commercial stations,【C1】______is to say, they earn their money from【

Most radio and television stations in the United States are commercial stations,【C1】______is to say, they earn their money from【

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问题    Most radio and television stations in the United States are commercial stations,【C1】______is to say, they earn their money from【C2】______or commercials. Private companies purchase radio and television【C3】______from the commercial stations in order to【C4】______their products. Cable television stations are also【C5】______stations, though they do not usually have advertisements.【C6】______watch cable stations, people must pay the cable TV company a certain amount of money each【C7】______.
   Public radio and television stations, on the【C8】______hand, do not have advertisements and people do not have to【C9】______to watch them. These stations gain their money from the【C10】______, from private companies, and from some of the【C11】______who watch or listen to their programs. The【C12】______government and some large corporations give【C13】______, large gifts on money, to the public stations. Small businesses and people also【C14】______money to their local public radio and television stations.
   ABC, CBS, and NBC are the three【C15】______commercial radio and television【C16】______in the United States. Most local commercial radio and TV stations【C17】______their programs from one of these national networks.【C18】______example, each network had a TV news program in the evening,【C19】______the local stations broadcast in addition to their【C20】______local news programs.
【C1】
选项 A、that
B、this
C、it
D、which
答案A
解析 该句为插入语，起承上启下的作用，句中后半句即为前半句进一步的解说，故选A。that’s to say那就是说，即换句话说。此题中D项干扰性较大，读者往往因which引导非限定性定语从句而误选D，但引导非限定性定语从句时，该从句应为一个整体，即句中不出现逗号。
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