-As long as USCIS receives your petition (put it into their system-evidence: your check is cashed or you get the receipt) before your I-94 expires, you are OK to continue your work.
另外,現在file 129之前的那個LCA目前需要多久啊,我記得一年以前是即時的,
但是目前好像需要幾天還是幾周來著,
-It may take two to three weeks.
See the follwoing artilce for some new information:
http://immigration.wenxuecity.com/BBSView.php?SubID=zzr&MsgID=913