When while structure

While I _________ (watch) Tv,the lights went off.

When the accident ______ (happen),we were going home.

While Tom _________ (swim )in the sea,he saw a dolphin.

when the visitors __________ (arrive) my mother made tea.

While my sister__________ (sleep),the telephone rang

Her mother cooked meal while she _________ (cook)meal

Her mother cooked meal while she _________ (cook)meal

When the teacher _________ (come) the students were shouting.

While we ________ (talk) with friends my father came

while he ________ (drive)back home it began to snow.