美国入籍考试，这个站点会学到更多。

http://www.neh.gov/

http://americanhistory.si.edu/citizenship/

https://www.uscis.gov/citizenship

https://my.uscis.gov/prep/test/civics/view  Good

I came to the United States for freedom and a chance to succeed.

https://www.uscis.gov/citizenship/learners/study-test/study-materials-civics-test/becoming-us-citizen-overview-naturalization-process