Hi:

Just in case you're connected and already worked on this exercise, the solution is as follows:

The definite article:
1. Superlative: the most exciting restaurant
2. Name: the Bay Tree
3. We know which one is referred to from the context: the service
4. We know which one(s) because it's/ they've been mentioned before: the place
5. The only one: the special house cocktail
6. Expression of time: in the morning

The "zero" article:
1. Plural/ general: young people
2. Place name: Cambridge
3. Abstract nouns: imagination
4. Uncountable nouns used in a general sense: coffee
5. Meals: breakfast
6. Expression of time: at night