82 грамматика. сборник упражнений

Вставьте somebody, anybody, nobody или everybody

18.There is somebody in the next room. I don't know him.

19. Please tell us the story. Nobody knows it.

20. Is there anybody in my group who lives in the dormitory?

21. Has somebody/anybody here got a red pencil? Оба варианта применимы.

22. Everybody can answer this question. It is very easy.