1) We _____(to walk) through the forest for an hour .
2) The tourists _____( not to visit) the picture gallery yet.
3) What______your brother___( to do)? - He____( to train) in the sport centre at the moment.
4)_________you join us at the tour tomorrow?- I think so.
5) My parents always_______( to buy) the tickets to the theatre beforehand.
6)She_______ (to prepare)for the report yesterday when the telephone rang.
7)Yesterday we______( not to know) about the excursion to the museum.
8)The tickets_______(to sell) in the ticket-box-office.