The appositive usually agrees with the noun it describes. In this example, both "реку" and "Волгу" are in the Accusative case (винительный падеж) because they follow the preposition "в." Punctuation with Names: Key Grammar Rules for Exercise 142 The appositive

Provides a clear view of the corrected text and the grammatical reasoning behind the punctuation. Key Grammar Rules for Exercise 142 The appositive

If you need to verify other sentences from this specific exercise, you can find step-by-step breakdowns on educational platforms: Key Grammar Rules for Exercise 142 The appositive