Choose the appropriate verb forms to complete the sentences.

1. Do you think that nobody (work/works) on national holidays? You are mistaken.
2. Did you see your neighbour (talk/to talk) with Mr.Hamilton just now?
3. We (have found/found) the keys to the barn door at last! - Where (did you find/have you found) them?
4. If he (joins/will join) us in the studio, he (will have/have) to follow our rules.
5. Mass media sometimes (publish/publishes) the facts which are not true.
6. When he arrived at the theatre, the curtain (had already been raised/ already rose).