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问题

It was not until 1920 ______ regular radio broadcasts began

A:while
B:which
C:that
D:since
正确答案是:
同类题型

valley was _____ in sunlight, andthe children were singing and jumping with joy

She must have ranked her birthday presentsin order ofbecausethe top one is her favotite

You didn’t use to play tennis, ______ — Yes. I still like playing tennis now.

in the Middle East, Jordan holds a keystrategic position, _______ both Israel and Iraq.

From May 6, pedestrians() 10yuan if they run red lights, according to Beijing traffic authorities.

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