extract|extracted|extracts

牙医不得不拔掉那颗坏掉的牙。

The dentist had to ___extract the damaged tooth.

我下周需要拔掉智齿。

I need to have my wisdom tooth ___extracted next week.

学生经常使用书籍摘录进行研究。

Students often use book ___extracts for their research.