請問8老師，我是綠卡持有者，在申請美國公民，申請材料遞交上去後已經半年了。
最近請州議員查詢後得到以下回複：
Thank you for your recent inquiry regarding this constituent’s immigration matter. U.S. Citizenship and Immigration Services (USCIS) records confirm that your constituent’s case is pending background check clearance.
請問8老師是否知道一般來說，背景調查需要多長時間?
-Case by case, some may take a couple of years (though it is rare)..
