Go to US official site: www.uscis.gov

来源: 于 2009-07-06 13:33:33 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

Then, click "Services & Benefits"
Then, click "Visit the U.S."
Then, click "How do I extend my stay?"

All the detailed information are available. Read carefully.