If it's single entry, you have to give it to airline staff before leaving. Don't forget to make a copy of it and bring it with you when return.
Is it multiple-entry? If yes, don't submit it. Use it next time.
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                    It is multiple-entry.Thank you for your help!
                     -texan777- 
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                        11/05/2007 postreply
                                                11:50:54
                    
                    
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                    回複:Is it multiple-entry? If yes, don't submit it. Use it next ti
                     -seattlesleepless- 
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                        11/05/2007 postreply
                                                13:59:19
                    
                    
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                    No, don't surrender the multiple-entry I-94 when leaving.
                     -giant_hippo- 
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                        11/05/2007 postreply
                                                14:16:59