题目内容
Colour TV was first shown in 1929. It took more than two decades, ______, until 1951, for colour broadcasts to begin in the
A. though B. still C. anyhow D. so
A

练习册系列答案
相关题目
It was not until 1938 _________ the first colour TV programme was broadcast.
A.which | B.that | C.when | D.on which |