be on it〈美口〉

例句：

1. 1. I need to be on it if there's an emergency.
   如果有紧急情况，我需要立即行动。
2. 2. We need to be on it right away if we have a deadline.
   如果我们有截止日期，我们得立刻行动。
3. 3. The company needs to be on it to ensure the project is completed on time.
   公司需要立即行动以确保项目按时完成。