

Ночью в лесу выл волк.
A wolf was howling in the forest at night.
Не бойся, это не волк, а собака.
Don't be afraid, it's not a wolf, it's a dog.
Здесь живёт волк?
Does a wolf live here?
"волк" is in the lesson "Dangerous animals" (Level 9), along with 16 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.