回复：请教小白兔和各位有关H1B与OPT关系问题

If your H1 start date is 10/1/2007, your H1 is approved but has not started, and will not start until 10/1/2007 or the day you re-enter US with H1 visa stamp. You will be in F1 if OPT approved until H1 starts.