It was not until 1920 regular radio broadcasts began. A.while b.which C.that D.since 查看更多

 

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It was not until 1920 _______ regular radio broadcasts began.

A. while   B. which   C. that    D. when

 

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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.

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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