1，Once you’re in here,listen to your teacher. 一旦到这儿来，就要听从老师的。
2，Once you begin,you must go on. 一旦开了头，就应该继续下去。
3，Once you see the film, you will never forget it. 一旦你看了这部电影，你将永远不会忘记。
4，Once I know this, I'll tell you. 一旦我知道了，就一定告诉你。
5，We didn't know how we would cope once the money had gone.一旦钱花光了,我们就不知道怎么办了。
6，The water is fine once you are in. 你一旦下了水,就会觉得水里挺舒适的。
7，I'll call you once I known. 我一旦知道了就给你打电话。
8，He will not be swerved from his course once his mind's made up. 一旦他已下定决心，就无法改变。
9，Once you get into a bad habit, it will be very hard to get rid of it. 你一旦染上坏习惯，就很难摆脱。
10，Once you start, you will never give up. 一旦你开始了，你就不要放弃。
11，Once the research is begun, nothing can be done to change it. 一旦研究开始，就没有什么可以改变它。
12，Once I killed you, you are not able to live on. 一旦我杀了你，你就不能再活着了。
