"I hereby declare, on oath, that I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state or sovereignty, of whom or which I have heretofore been a subject or citizen; that I will support and defend the Constitution and laws of the United States of America against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I will bear arms on behalf of the United States when required by the law; that I will perform noncombatant service in the armed forces of the United States when required by the law; that I will perform work of national importance under civilian direction when required by the law; and that I take this obligation freely without any mental reservation or purpose of evasion; so help me God."
  OATH OF ALLEGIANCE TO THE UNITED STATES OF AMERICA

If you wish to establish or assess your eligibility to become a U.S. citizen, DV Information and Registration Service offers you a complete set of references, samples, forms and detailed instructions on how to make a realistic assessment of your individual assessment for U.S. citizenship. This set is available by  downloaded because of the amount of text and information.
All criteria and topics will be covered in the Immigration Package:
Basic naturalization requirements are:

• Residence and Physical Presence

• Good Moral Character

• Attachment to the Constitution

• Language

• United States Government and History Knowledge

• Oath of Allegiance