If you had a question that was removed, you should have received an e-mail from HubPages telling you why.
The e-mail might have said something like:
"Your question has been removed because it encouraged a discussion rather than a Hub or short answer. Surveys and poll-type questions do not belong in the Q&A section. To engage in a discussion or conversation, please post in the Forums section at http://hubpages.com/forum/, or for private conversation you can contact another Hubber directly from their profile page.
Please contact us at firstname.lastname@example.org if you would like additional information.
I hope this information helps.