1. не (to sit) in a cafe, when i (to see) him. 2. my friend (to talk) to the teacher, when i (to see) him. 3.when the phone (to ring), they (to have) dinner. 4.the boy (to fall) and (to hurt) himself while he (to ride) his bicycle. 5. she (to wait) for her sister, when i (to see) her. 6. when the pupils (to hear) the bell, they (to get up) and (to leave). 7. when i (to go) out, the sun (to shine). 8. while she (to play) the piano, i (to write) a letter. 9. he (to go) to the university, when i (to meet) her. 10. our friends (to discuss) something when we (to interrupt) them. 11. my mother (to watch) tv,