回複：回複：8老師，PIJIANG老師 I-94 差了一張 怎麽 辦

Thanks. After I came back from Mexico in Aug. 2007, I didn't go back to China; however in Nov. 2007, I crossed the border to Canada and went back immediately just to change my status back to F1, and I have the I-94 for this entry. If this is the case, do I still need to replace the missing F1 I-94 when I came to the country from Mexico?