52单词网 > 高中英语 > 高中英语题库 > It was not until 1920 regular radio broadcasts began. A. while B. which C. that

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

来源:网络 时间:
It was not until 1920 regular radio broadcasts began. A. while B. which C. that

It was not until 1920 ________ regular radio broadcasts began.

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

 

试题答案

C

此题为not…until 的强调句型。