你知道怎么操作摄像机吗？

Do you know how to ___work the video camera?

那时，我还学会了如何在戏剧中操作灯光。

At that time, I also learned how to ___work the lighting during the play.

他无需培训就能操作复杂的机器。

He can ___work the complex machinery without any training.