1. What's your favorite animal? (제일/ 가장) 좋아하는 동물이 뭐예요? Only use 을/를 when a noun is receiving an action. 2. What's your favorite color? (제일 or 가장) 좋아하는 색깔이 뭐예요? 은 might imply that the topic of colors has been introduced already. 3. Do you think that ghosts are real 귀신/ 유령이 진짜인 것 같아요? Do you think ghosts exist? 귀신/유령이 존재하는 것 같아요? Never use 당신 unless you are trying to make someone angry. Sometimes it's used between married couples but I hear it's still not all that common. If you want to address someone use their name or title or 너 if you are really close or if it is obvious who the subject is just leave it out entirely. 4. Do you know Spanish? 스페인어를 할 줄 알아요? 5. Do you like chocolate chip cookies? 초콜릿 칩 쿠키를 좋아해요?