He acts bravely because he is brave.
bravely
It was once a dirty kid that was playing outside.
dirty
He often studied maps and explorers' journals.
often
The (fastest, most fast) of all the animals is the cheetah.
fastest
People tried to imagine a nice place where everybody help each other.
nice
An adverb describes.....
an adjective
healthier
The landscape includes green meadows, lakes, ponds, woods, and beautiful gardens.
green
beautiful
On May 14, 1804, Mary worked neatly in all her duties.
neatly
Jack London spoke (more polite, politely, most politely) during his presentation.
politely
In 1858 there was a national competition for a plane to turn the spot into an attractive park.
national
attractive
terribly
Fortunately, Leo works (hard, harder, hardest) than his old brother.
harder