Listen to the text in Viber and choose the correct item to complete the sentences.
1.The American Broadcasting Company first aired...on August 19,1950
The first..... to perform for television was Burr Thillstrom, who broadcast live from the New York World's Fair in 1939
Chidren's television developed ....during the early years.
The columbia Broadcasting systembegan airing ....in 1955.
At thr beginning the network offered ... per week.
Beginning in the early 1960s, networks broadcast cartoons....
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