Задание: work in pairs: decide which is the correct tense.Past Simple

Задание: work in pairs: decide which is the correct tense.Past Simple or Past continuous? a) Five years ago I 39; travelled39;/ 39;was travelling39; on a plane b) We 39;left39;/ were leaving39; the cinema before the end of the film c) When I came to the station Ann 39;talked39; / was talking to the porter. d) Where did you 39;go39;/ 39;were you going39; on your last summer holiday? e) When I heard the alarm I 39;left/ was leaving39; the room immediately.... f) 39;I walked/ was talking39; in the street when I suddenly 39;herd / was hearing39; someone call me. g) We 39;went/ were going to the city. Bit on the way we 39;heard/ were hering39; about a bomb scare. So we 39;drove/ were driving39; back home