about to: 打算...
That might be about to change.
这种情况可能即将发生变化。
These men were about to surrender!
这些人就要投降了！

scare: 害怕
But why this health scare in particular?
但是为什么唯独是健康恐慌呢？

take over: 替换
A younger generation will begin to take over.
年轻一代将会开始接管中国的事务。
Are you planning on appointing an heir to take over your responsibilities upon retirement?
你有无计划在退休时安排一位接班人接替你的工作？