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本人以一个作废的回美证进入了美国（并非有意）

-What does 作废的回美证mean? Did the IO put the admission/entry stamp on your passport? How did you get the 回美证 before you filed I-485? Are you the immediate relative (e.g. spouse, minor child or parent) of a US citizen?

，然后递交了485。现在移民局正在schedule interview. 请问这种情况下面谈需要带一个律师吗？

-You had better consult the immigrant lawyer, but not have to hire the lawyer for the interview.

会不会在面谈中被递解出境呢？