i received an email from USCIC today, say as below for asking evidence, is anyone knows what kind of evidence will be need to submit normally:
the last processing action taken on your case
Application Type: I485 , APPLICATION TO REGISTER PERMANENT RESIDENCE OR TO ADJUST STATUS
Current Status: Request for Additional Evidence Sent
On March 28, 2008, we mailed a notice requesting additional evidence or information in this case I485 APPLICATION TO REGISTER PERMANENT RESIDENCE OR TO ADJUST STATUS. Please follow the instructions on the notice to submit the requested information. This case will be in suspense until we receive the evidence or the opportunity to submit it expires. Once we receive the requested evidence or information and make a decision on the case, you will be notified by mail. If you move while this case is pending, call 1-800-375-5283 to update your address.
If you have questions or concerns about your application or the case status results listed above, or if you have not received a decision from USCIS within the current processing time listed*, please contact USCIS Customer Service at (800) 375-5283.