“最后一天”用的介词是什么，是on吗

用介词on。

例句：

1. On the last day of our visit, I found myself alone on a busy corner across the street from our hotel.

在我们参观的最后一天，我自己一个人，在旅馆对面街道上一个喧闹的角落里。

2. On the last day I made a big decision.

到了最后一天，我作出了一项重大决定。

3. "I wanted to see him on his last day and I happened to be in the right place at the right time, " she said.

“我期待着在他访问澳大利亚的最后一天能够看到他，而我也恰好出现在了合适的时间和地点，”她说。

4. On the last day of this series on cutting your food costs, I'd like you to choose two from each day and begin implementing them into your daily life.

在最后一天在削减您的食物成本的这个系列，我希望您从每天选择二个并开始实施到你的日常生活。