(ago already always before ever for just never since yet(x2))
EXAMPLE: She has always liked him; since the moment they met.
1) It's been a month ___ we last had a meal together.
2) We haven't seen each other ___ years.
3) I think I've been here ___.
4) The accident happened 10 years ___.
5) A: Have you tidied your room ___?
B: No, I'll do it later.
6) Mom, I have ___ tidied my room. Can I go out now?