nag|nags

农场里有匹老马，已经跑不动了。

There's an old ___nag on the farm that can't run anymore.

我妻子总是唠叨我要按时吃饭。

My wife always ___nags me about eating on time.

我们的老师是个十足的规矩狂，连铅笔摆放都要管。

Our teacher is such a ___nag about even how we place our pencils.