13. the pupils still (write) their compositions when the bell (ring). 14. she (walk) along the street when she (see) an old friend. 15. the woman was very tired, and she (lie) on her bed when her children (come) home from school. 16. the sun (rise) when i (wake) up this morning. 17. the sick child (sleep) when the doctor (come). 18. i (read) the newspaper when i (hear) a strange noise. 19. it (rain) hard when i (go) out this morning. 20. we (listen) to the wireless when the telephone bell (ring). 21. the little boy (fish) when he (fall) into the river. 22. jack's mother (cook) the dinner when he (come) home from school. 23. a lot of people (see) this accident while they (wait) for the bus. 24. he often (go) to the british museum when he (study) at london university. 25. he (fall) down and (break) his leg while he (play) football. 26. the travelers (reach) the town just as the sun (set). 27. the boy (jump) off the bus while it (go). 28. the hunter (shoot) and (kill) the lion just as it (jump) on him. 29. mary's mother often (sing) while she (cook) in the kitchen.
30. the old man never (go) out when it (rain).
13 were still writing; rang
14 was walking; saw
15 was lуing; came
16 has risen; woke up
17 was sleeping; came
18was reading; heard
19 was rainin; came
20 were listening; rang
21 was fishing; fell
22 was cooking ; came
дальше по аналогии