◎ 题干
Color TV was first shown in 1929. It took more than two decades, _____, until 1951, for color broadcasts
to begin in the USA.
[     ]
A. though
B. therefore
C. otherwise
D. anyway
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Color TV was first shown in 1929. It took more than two decades, _____, until 1951, for color broadcaststo begin in the USA. [ ]A. though B. therefore C. ot…”主要考查了你对  【副词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。