请教8老师: 姐妹申请移民,现已排到,收到信要交材料,可我妹不想来,但又觉得放弃可惜。有办法拖吗?能拖多久
-Your sister must submit the DS 260 (i.e. immigrant visa application) within one year from the date NVC informed you. Otherwise, your case will be revoked.