多谢老师回复!
还有几个问题请教老师。
被退回来的这份是以老婆的名义申请的(主要说的是cover letter)-Your wife needs to sign the I-485 also.
.需要我们各准备一封cover letter吗?
-When you filed your I-140/I-485, you indicated you are married with your wife in the Forms (Part 7 of I-140 and Part 3.B of I-485, didn't you? Not need to并写写明会一起申请 (actually your wife did not 一起申请 with you, but do following-to-join).