我找了半天，终于找到了我的钥匙。

I looked for a long time and ___finally found my keys.

我练习了很久，终于学会了骑自行车。

I practiced for a long time and ___finally learned how to ride a bike.

我等了很久，公交车终于来了。

I waited for a long time, and the bus ___finally came.