Put the verbs in brackets into the past simple, the past continuous on past perfect tense. 2.1. / (to wait) for my sister when (to start) to rain. 2.2. / suddenly realized that / (to lose) my wallet. 2.3. when they (to come) to london, they (to visit) many mu seums. 2.4. cindy (to break) her leg while she (to snowboard). 2.5. hardly we (to finish) dinner when the doorbell rang. 2.6. while we (to wait) , we (to do) crossword puzzles.