Past simple and past continuous: simultaneous events

https://www.perfect-english-grammar.com/past-simple-past-continuous-exercise-1.html

http://www.focus.olsztyn.pl/en-past-simple-past-continuous-exercises.html#.XE76eMtKiCg

https://www.ecenglish.com/learnenglish/lessons/past-simple-vs-past-continuous

http://www.esl-lounge.com/student/grammar/2g50-past-simple-or-past-continuous-worksheet.php

https://www.ego4u.com/en/cram-up/grammar/simpas-paspro

1. While Tom (play)  the piano, his mother (do)  the washing-up.
2. When I (do)  the washing-up, I (break)  a plate.
3. I (have)  dinner when I suddenly (hear)  a loud bang.
4. When my father (work)  in the garden, an old friend (pass)  by to see him.
5. She (go)  to school,  when a car (crash)
6. When it (rain)  , our dog (want)  to come inside.
7. When Jane (live)  in Ireland, she(do)   a language course .
8. When I (sit)   at home, I (see)  a monkey in the garden.
9. I (not / understand)  what they (talk)  about.
10. He (drink)  some juice when she (offer)  him a few chips.
11. I (jog)  in the park, when two squirrels  (cross)   my way.
12. Robert (fall)  off the ladder when he (pick)  cherries.
13. When we (travel)  around Ireland, we (meet)  some very nice people.
14. While she (speak)  on the phone, the milk (boil)  over.
15. When I (leave)  the house this morning, the sun (shine).
16. Caroline (burn)  her hand when she (iron) 
17. While the parents (have)  breakfast, their children(run)  about.