Bonjour,
Réponse :
a. Steamboat is the most common boat on the Mississippi River.
b. The accordion and fiddle are the most popular instruments of Cajun music.
c. Pontchartrain Causeway is the longest bridge over water in the world.
d. The State Capitol Building is the tallest capitol building in the USA.
e. California is the most populous state in the USA.
f. The Grand Canyon is the largest canyon in the USA.
Explications :
adjectif courts : the + adjectif-est
( 'large' se termine déjà par un 'e', on ajoute juste 'st' )
adjectif long : the most + adjectif
