根据句意，在相应的横线上，写出括号内所给单词的适当形式。
It is getting more and more ________ (pollute). We should do something to solve the problem.
I don’t like the persons whose clothes are ________ (tidy).
They designed a car ________ (special) for disabled people.
Here is a list of the early ________ (settle) names. They have lived there for 30 years.