◎ 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, forcolor broadcasts to begin in the USA.A. though B. therefore C. ot…”主要考查了你对  【并列连词】【从属连词】  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。