Most radio and television stations in the United States are commercial stations, 【26】_____

_ is to say, they earn their money from 【27】______ or commercials. Private companies purchase radio and television 【28】______ from the commercial stations in order to 【29】______ their products. Cable television stations are also 【30】______ stations, though they do not usually have advertisements. 【31】______ watch cable stations, people must pay the cable TV company a certain amount of money each 【32】______ .

Public radio and television stations, on the 【33】______ hand, do not have advertisements and people do not have to 【34】______ to watch them. These stations gain their money 【35】______ the government, private companies, and from some of the 【36】______ who watch or listen to their programs. The 【37】______ government and some large corporations give 【38】______ , large gifts on money, to the public stations. Small businesses and people also 【39】______ money to their local public radio and television stations.

ABC, CBS, and NBC are the three 【40】______ commercial radio and television 【41】______ in the United States. Most local commercial radio and TV stations 【42】______ their programs from one of these national networks. 【43】______ example, each network had a TV news program in the evening, 【44】______ the local stations broadcast in addition to their 【45】______ local news programs.

【26】

A．that

B．this

C．it

D．which