2. 外语
  3. One of the three major commercial networks, CBS were organized in 1928 when its founder William 【M1】___________. Pal

One of the three major commercial networks, CBS were organized in 1928 when its founder William 【M1】___________. Pal

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问题     One of the three major commercial networks,
CBS were organized in 1928 when its founder William             【M1】___________.
Paley acquired ownership of a group of radio station.           【M2】___________.
    As the Columbia Broadcasting System expanded its
operations, soon become the largest radio network in the        【M3】___________.
United States, it precociously recognized the potential
for the rapidly evolved television broadcasting                 【M4】___________.
technology. On July 13th, 1931, it began experimentally         【M5】___________.
television broadcasting in New York, and ten years later
began regular black and white week broadcasts over              【M6】___________.
its WCBW TV station in the same city, that became               【M7】___________.
    WCBS TV in November 1946. With Television City
in Hollywood, CBS launched the industry’s first full
scale production studio.
    Today CBS owns television stations, radio stations,
and home video productions and distribution interests.
The CBS Broadcasting Group composed of six                      【M8】___________.
divisions: television network, entertainment, sports,
news, local television stations, and radio.
    For most of commercial television history, CBS
has been the leader in prime time ratings, having the
highest rated shows in almost every year from the
mid-1950s through the mid-1980s. During the late
1980s, however, CBS lost its top position from NBC.             【M9】___________.
    CBS has traditionally been strong in the TV
news area. The network began the first regular TV news
program in 1948 with Douglas Edwards as anchor.
Journalism legends such as Edward R. Murrow and
Walter Cronkite, gave CBS its reputation as quality             【M10】___________.
news broadcaster.
【M3】
选项
答案become改成becoming
解析 As the Columbia…operations是一个由as引导的伴随状语从句，主句应该是it precociously recognized the potential…。soon become…United States的逻辑主语与从句主语相同即the Columbia Broadcasting System，所以become用现在分词形式，使该部分充当结果状语。并列动词间一般用and连接，句中并未出现，所以不建议把become改为became。
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