Thank you for your interesting topic. I just want to help you with your topic. It is almost correct " Do you believe there is ghost in the world?" must be " Do you believe there are ghosts" or " Do you believe that ghosts exists?" or " Do you believe in ghosts?" or " Do you believe that there is a ghost on earth?"

It is a very interesting topic. I have read many ghost stories and books. Sometimes I want to believe in ghosts but other times I think that ghosts dont really exist. If you search on Internet, you might find interesting ghost topics.

Good luck with your English!!!! Teacher Hannes. 

I think that everything is possible and even if we don't see it  doesn't mean that they don't exist ..))

I wish they were real, it would be interesting to date a ghost :P No, I don't think they exist.

İ dont believe ghosts.

But İ believ angels and gins.

I believe there are ghost because I saw it in eyes...