一下是做infopass的步骤，欢迎补充
Infopass steps:
1.http://infopass.uscis.gov/
2.Click for English-continue
3.Click make your appointment with infopass-continue
4.Insert your zip code-continue
5.Continue
6.Choose: You need information or other services-continue
7.Continue
8.Fill out the information-continue
9.Choose a date from calendar-continue
10.Choose a time from schedule-continue
11.Final review or make changes-continue
12.Print out the infopass appointment
