1。出境時需同時交出原來入境時的I-94和新批準的I-797上的I-94嗎？
-Only the last one (I-797 I-94).
2。入境時，辦新I-94需要什麽證明文件？
-Same as you did before from Canada to US: passport, latest three month paycheck stubs or employment verification letter from the employer, the H1 approval notice.
I-797A上寫 “The petitioner should keep the upper portion of this notice." 所以，入境時，是否出示I-797A的複印件及下半聯左側的原件就夠了？
-Fine.
3.如用EAD/AP卡入境，將來如何回到H1B身份？
-Extend the H1 in US or go outside US and reenter US.
謝謝
