The assistant felt angry about the ________ rules of the company.  (fair)

Because of the ________ weather, quite a few kids got a bad cold.  (change)

As we all know, fresh water is a kind of ________ resource in the world. (limit)

I usually listen to some _________ (悦耳的) music to help me relax after a long week at work.

people,old, lonely, a lot of, are

_________________________________________________________________.