2014年5月申请父母的绿卡，2015年4月收到通知“We registered your permanent resident status and mailed you a Welcome Notice.”和“We ordered your new card.”，但是过了3天后又收到通知“We reopened your Form I-485, Application to Register Permanent Residence or to Adjust Status, and are reconsidering our earlier decision.”，到现在一直没有消息，请问8老师等前辈请问我们除了等待还能做些什么？