Ответ:

arrived, was writing

was crossing, saw

did they shout, woke up

was fixing, opened

did mary broke , she was skating

was sleeping, knocked

saw, wasn't talking

was watching, went

wasn't crossing, struck

didn't fall, was running away

fell, was reading

was driving, didn't answer

was having, started

found, went, turned

walked, was talking, were working, were discussing

went, wasn't there, was studying

read, was waiting

saw, didn't dance

was driving, texted