Complete the sentences using ONE word:
1. Sarah is lucky because she has .... a really easy-going boss.
2. We .... a nice coffee and then went for a walk in the park.
3. Do we really have .... invite Barry to the party?
4. If I .... known it was Sheila, I wouldn't have recognized her.
5. Sorry, I haven't a .... what this word means. I just don't know.