15. While Tom (play) the piano, his mother (do) the washing-up 16. He (drink) some juice and then he (eat) a few chips. 17.1 (have) dinner when I suddenly (hear) a loud bang. 18. When my father (work) in the garden, an old friend (pass) by to see him. 19. She (go) to school, (take) out her textbook and (begin) to learn. 20. When it (start) to rain, our dog (want) to come inside. 21. Almost everybody (leave). 22. She already (post)... (send).... 23. When she (finish). 24. He (do).... TAG QUESTION! ....... by the time we (arrive).. the letter when she (realize). she it to the wrong address. her work she (go)..... her homework before he ( go)... ...to the cinema. out.