Use the corect forms of the adjectives. 
a, August is .the hottest..(hot) month of the year.
b, I think Japanese is.the most difficult..(difficult) language in the world.
c, Thomas Edison is one of .the greatest..(great) inventors of all time.
d, Is Moutain Fuji ..the highest.(high) moutain in Japan?
e, This is ..the most exciting.(exciting) match I've ever seen.
f, Brazil is the stronggest...(strong) country in football.
g, Nha Trang is...the most beautiful.(beautiful) beach I've ever been to.
h, Nam is ..the most intelligent.(intelligent) student in the class.
i, The blue whale is .the largest..(large) animal that ever lived on Earth.
j, Tom Hank is one of .most successful..(successful) actors of the 20th century.