问题补充:
It was not until 1920 regular radio broadcasts began.
A. when
B. which
C. that
D. since
答案:
A. when
B. which
(答案→)C. that
D. since
解析:这是一个强调句式
时间:2021-12-02 12:18:55
It was not until 1920 regular radio broadcasts began.
A. when
B. which
C. that
D. since
A. when
B. which
(答案→)C. that
D. since
解析:这是一个强调句式