It was ___how much time had been wasted.

题目

It was ___how much time had been wasted.
A.not until the marks came out did he regret
B.until the marks came out that he didn"t regret
C.not until the marks came out that he regretted
D.until the marks came out he didn"t regret
能给我既准确又有足够解释的答案吗？

答案

C
直到成绩出来他才懊悔他浪费了很多时间.
it was not until ,it was until 都用于强调句结构,
如
He didn't come until 8:00---------------It was not until 8:00 that he came(他直到八点才来)
反正 是否定的时候 not until 一定连在一起