这只猫头鹰正在捕食田里的老鼠。

The owl ___preyed on the mice in the field.

骗子专门利用那些渴望快速致富的人来牟利。

The con artist ___preyed on people desperate for quick riches.

这个决定一直压在他心头，让他夜不能寐。

The decision ___preyed on his mind, keeping him awake at night.