it was not until 1986 that

Question

____table tennis was accepted as a regular part of th olympic games.
a.it was in 1986 when b.it was until 1986 that
c.it was not until 1986 that d.not until 1986
这道题我读着都乱了!是不是有什么固定搭配啊!

Answer 1

答案是C,强调句型,It's……that……
A：应把when改成that
B：not也应提前,not until 直到……才……
D：如果是not until 打头,句子应到装

Answer 2

until 与not until的用法区别！