I just got RFE for my I485. It asks for the proof of that I was lawfully admitted to the US as a nonimmigrant prior to filing my case. It requires a copy of I-94 issued upon my last admission or explanation if no I-94. My current I-94 is detached from my H1B approved notice but it is not issued on my last admission. In my original submission, I have enclosed its copy.
My last entry to US is from Canada but no new I94 was issued because I drove to Canada and back on the same day. When driving into the US, the office on the border just checked my passport and H1b approval notice and let me in without issuing I-94 and without any stamp on my passport.
Could you please give me some suggestion for how to respond to this RFE.