Hardly ________ the plane when I was warmly welcomed by a text from the lovable Mikey．

1. A.
   did I step off
2. B.
   I stepped off
3. C.
   had I stepped off
4. D.
   I had stepped off

Hardly ________ the plane when I was warmly welcomed by a text from the lovable Mikey．

       A．did I step off    B．I stepped off    C．had I stepped off     D．I had stepped off