Last night we _ back until the teacher left school.a went b didn't c. haven't d wouldn't

选b,但要改为：didn't go
[昨天晚上我们直到老师离开学校才回去。]
原因很简单，时间是last night(昨晚)，是具体的过去时间，只能用一般过去时,排除c,d。而且，要掌握“not…until…（直到……才……）”，所以排除肯定式a

c

B.not……until直到……才

Last night we _ back until the teacher left school.
a went b didn't c. haven't d wouldn't
选B
因为until前应该是短暂或终止性的动作
until用于肯定句时和延续性动词连用
I will wait for you until 10 o'clock