It was ______ late into the night that they stopped their work.

问题描述:

It was ______ late into the night that they stopped their work.
It was _________ late into the night that they stopped their work.
A.not until B.until C.till D.not
并且翻译,

not until.that 这是固定搭配,解作:直到...才.
全句 意思是:他们工作直到深夜才停止.