I LAST SAW HIM AT MY TWENTY-FIRST BIRTHDAY PARTY.A. I HAVEN'T SEE...

1422)I last saw him at my twenty-first birthday party.A. I haven't seen him since my twenty-first birthday party.B. I didn't see him since my twenty-first birthday party.C. I haven't had a birthday party for twenty-one years.D. I had twenty-once birthday parties.