Complete the sentences with the comparatives and superlatives of the adjectives in brackets.
a. Water is _______________________________ (EXPENSIVE) than beer at this restaurant.
b. What is _______________________________ (POOR) country in the European Union?
c. What's _______________________________ (INTERESTING) thing you ate on your trip?
d. Country life is _______________________________ (HEALTHY) than city life.
e. The climate of Canada is _______________________________ (COOL) than that of Japan.
f. The Vatican Library is one of _______________________________ (OLD) libraries in the world.
g. I'm _______________________________ (LUCKY) guy in the world to have such a wonderful girlfriend. h. The Atacama Desert in northern Chile is _______________________________ (DRY) place on Earth.
i. We'll try to be _______________________________ (CAREFUL) next time.
j. The sun rises _______________________________ (EARLY) in summer than in winter.
k. Cities are usually _______________________________ (POLLUTED) than villages.
l. The Grand Canyon is one of _______________________________ (POPULAR) places in the USA. m. Tom is thirty pounds _______________________________ (HEAVY) than Mary.
n. The Atlantic Ocean is _______________________________ (SALTY) than the Pacific Ocean.