They _____ (not come)back home until they finished the work.

问题描述:

They _____ (not come)back home until they finished the work.

didn't
因为根据后面的finished我们晓得时态是一般过去式
这道题的考点是not until也就是,直到……才……
这道题的意思是
他们直到完成了工作才回家
所以就是didn't啦