我父亲在一家工厂工作了二十年。

My father has ___worked in a factory for twenty years.

我的手机进水后就不工作了。

My phone stopped ___working after it got wet.

她正在努力学习通过考试。

She is ___working hard to pass the exam.

这位工匠正在将金属加工成精美的饰品。

The craftsman is ___working the metal into delicate jewelry.

这种学习方法真的有效，我的成绩提高了不少。

This learning method really ___works - my grades have improved a lot.