上个月交的材料，要求延期半年到今年12月份，刚收到移民局的信要求补材料：
1. submit evidence to establish that you have a residence abroad to which
you intend to return.
2. submit evidence that you are in in possession of a return transportation
ticket to secure your departure from the United States.
对于第一项，父母的身份证复印件可以吗?需要翻译和公证吗？
第二项，父母来美时买的是单程票，我给父母预订12月份的返程票，然后把行程单的复
印件发给移民局可以吗？
