I (to wait) for my sister when it (to start) to rain. 2) I suddenly realised that I (to lose) my wallet. 3) When they (to come) to London, they (to visit) many museums and art galleries. 4) Cindy (to break) her leg while she (to snowboard). 5) Hardly we (to finish) dinner when the doorbell rang. 6) While we (to wait), we (to do) crossword puzzles.