回複：請幫忙!今天公民第二次麵試兩個小時！

USCIS will not only deny N-400, but also start the removal proceeding because your I-751 was determined as fraud, which means your LPR is baseless because I-751 should not have been approved. So you will need to appear before an immigration judge, get a lawyer specialized in dealing with removal proceeding. Your chance is still good to keep LPR.