before names of lakes

when it's only one (unique)

only before singular countable nouns

before names of deserts

with families (__ Simpsons)

can be used before any type of nouns: countable, uncountable, singular or plural

before PLURAL countable and uncountable nouns

before names of meals

with set phrases: take __ long time; once in __ while; __ range of

before singe mountains and islands

with abstract nouns

to talk about things in general

with oceans, seas, rivers, canals

with sports, games, languages and school subjects

with: north, south, east, west

with: northern, southern, eastern, western

when it's clear to the listener what's being talked about

with inventions and musical instruments

entertainment (places in the city)

names of shops, restaurants, airports, place + number

with continents, cities and states

in phrases of quantity or frequency (twice __ week; 5 euros __ kilo)

with some illnesses