（ ）last week that they finished doing their homework.

（ ）last week that they finished doing their homework.
A、Until
B、It was until
C、Not until
D、It was not unitl
【正确答案】：D
【题目解析】：强调句型，强调的是时间状语，it was not until that,句子含义是没有做完家庭作业的情况下，他们直到上周才完成。