It was not until 1920      regular radio broadcast began.A.whileB.whichC.thatD.s

It was not until 1920      regular radio broadcast began.A.whileB.whichC.thatD.s

题型:不详难度:来源:
It was not until 1920      regular radio broadcast began.
A.whileB.whichC.thatD.since

答案
C
解析
众所周知,当时间状语由until/till引出时,如果谓语动词为非延续性动词,则要用否定式,表示“直到……才……”。本句的正常结构应为:Regular radio broadcast didn’t begin until 1920.如果强调本句的时间状语,则要把not和until...一起放在句首,可以构成:Not until 1920 did regular radio broadcast begin.(注意表示否定意义的副词位于句首,要倒装),如果使用强调结构,则可构成:It was not until 1920 that regular radio broadcast began.
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