It was not until 1920 regular radio broadcasts began. A．while B. which C. that D. since——青夏教育精英家教网——

摘要： It was not until 1920 regular radio broadcasts began. A．while B. which C. that D. since

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It was not until 1920 ______ regular radio broadcasts began.

A．while　　　

B．which　　　　

C．that　　　　

D．since　　

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It was not until 1920 ______ regular radio broadcasts began.

A．while　　　

B．which　　　　

C．that　　　　

D．since　　

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It was not until 1920 ________ regular radio broadcasts began.

[　　]

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It was not until 1920 ________ regular radio broadcasts began．

A．while

B．which

C．that

D．since

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It was not until 1920 ________ regular radio broadcasts began.

[　　]

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