1.While the children ___ (to draw), their parents ___(to watch) TV. *
2.What (to do) when you ___(to hear) the news? *
3.The students __(to open) their exercise books and ___(to start) witing. *
4.While we ___(to wait), we (to do) crossword puzzles. *
5.He (to meet) a lot of friendly people before he ___(to move) to California. *
6.After Angela (to lock) the door, the school bus ( to arrive). *
7.Cindy ___(to break) her leg while she (to snowboard). *
8.When they (to come) to London, they (to visit) many museums and art galleries. *
9.My faher (to drive) at 70 km per hour when a policeman (to stop) him. *
10.He (to listen) to the radio while he( to prepare) breakfast. *
11.Hardly we (to finish) dinner when the doorbell ___(to ring). *
12. I __(to lose) my keys while I ___(to walk) to school. *
