亲爱的8老师，
我是2009年4月底给我儿子F1（21以上未婚子女）办理申请绿卡。
我的排期还只是到2008年1月。今天收到他们给我的交材料和交费用的信，是否这是正常的步骤呢？
-Yes.
件有可能提前呢？
另外国内的儿子为什么没有收到同样的信件呢？
-He will be contacted later.
收到这样的信件后，离interview还有多久呢？
-Case by case after the PD is current.
信中说要Choose an agent是什么意思呢？那么我要选谁做我的agent呢？
-That means your child needs to choose someone in US to be his agent to receive the NVC letter for him. You can be his agent, so just fill your name as his agent in the form , thus NVC will contact you for his visa application issue. He may need to sign the form, so you can fill the form and scan it and email to him, then he can print it out and sign it and email it back to you, then you print it out and mail it to NVC.
对不起，实在是没有任何经验问了一些最愚蠢的问题。望原谅，并望得到您的帮助。
