问题补充:
It was not until 1938 the first colour TV programme was broadcast.
A. which
B. that
C. when
D. on which
答案:
A. which
(答案→)B. that
C. when
D. on which
解析:
试题分析:考查强调句型。从句意可知即使不填选项,句子意思仍然完整,所以判断为强调句型。强调句型的特点是去掉it is ….that 部分,句意完整通顺,所以答案为B。句意:直到1938年第一个彩色电视节目才被播出。