The ________ changed the course of history in our nation for many years.
civil war
To ________ your writing skills, you should read more books and practice daily.
enhance
The city implemented new rules to _________ the amount of waste produced each day.
curb
They buried a _________ in the park to share memories with future generations.
time capsule
Many people are willing to make a __________ for their families' happiness and security.
sacrifice
The story tells about a __________ who fought for his freedom in the 1800s.
slave
As a _________ citizen, he always follows the rules and respects the police.
law-abiding
The country signed a ____________ to promote peace and cooperation with its neighbors.
treaty