Past continuous WHEN

<ol><li>(I / do / my homework) - (the phone / ring)</li><li>(she / walk / to school) - (it / start / to rain)</li><li>(we / play / football) - (our mom / call / us)</li><li>(the teacher / talk) - (the students / listen)</li><li>(Tom / fall / down) - (he / run / fast)</li><li>(they / eat / lunch) - (the fire alarm / go off)</li><li>(my dad / drive / to work) - (he / see / an accident)</li><li>(the dog / sleep) - (the cat / jump / on the table)</li><li>(I / find / a coin) - (I / walk / in the park)</li><li>(we / watch / a movie) - (the power / go out)</li><li>(she / take / a shower) - (someone / knock / on the door)</li><li>(they / swim / in the pool) - (it / start / to rain)</li><li>(he / play / the piano) - (his mom / come / home)</li><li>(I / write / a letter) - (my friend / call / me)</li><li>(the baby / cry) - (the dog / bark)</li><li>(my sister / read / a book) - (I / ask / her a question)</li><li>(we / have / dinner) - (our dad / come / home)</li><li>(they / dance / at the party) - (the music / stop)</li><li>(I / wait / for the bus) - (my friend / arrive)</li><li>(he / run / in the park) - (he / fall / down)</li></ol>