事到临头

• at the last moment
• when the situation becomes critical

参考释义

事到临头 [shì dào lín tóu]

• -

例句

1. 他事到临头却退缩了。
   He got cold feet at the last minute.
2. 我是说过要去的，但事到临头却不得不改变了主意。
   I said I would go, but had to cry off at the last moment.