23.it was not until it got dark ______ working

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23.it was not until it got dark ______ working
A)that they stopped
B)when they stopped
C)did they stop
D)that they didn’t stop

这是一个not until句型的强调句.
一般强调句的结构是：It is/was +被强调成分+that/who+其余成分
所以强调not until引导的时间状语或者时间状语从句是,句子结构是这样：
It is/was +not until+从句+that+其余成分（这时候,not已经提到被强调成分中,所以that后面再不用否定词.）综上所述,答案为A

23.it was not until it got dark ______ working It was not until it got dark ___ _______ working. 9.It was not until dark ________ ... 英语语法：It was not until dark that he found She didn't stop working until it was dark.（保持原句意思不变） We won not stop working until it will be dark哪里错了该怎么改这句是强调句型吗?It was not until dark that she relized it was too l It was not until dark that she found that she thought was th It was not until after midnight that the party ______ It was not long until ... not ...until it was not until Not until 1.it was not until she look off her dark glasses that i ___(