组卷网 > 高中英语综合库 > 语法 > 句法 > 特殊句式 > 强调句 > It be…that/who强调句型
题型:单项选择 难度:0.94 引用次数:983 题号:275183
It was not until 1920 ______ regular radio broadcasts began.
A.whileB.whichC.thatD.since
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