I was studying English because I had an exam

My parents were travelling a lot when I was a child

I was travelling when my sister visited me.

I was working when my husband called me.

Well done !

I was swimming in the see,(sea) when my sister found a new boyfriend (huh?)

I was sleeping when my father cooked me breakfast

I was listening to music when my friend returned home

It was raining when they played football

I was eating when the class started.

I was walking with my dog when I met my friend.

I was studying when she read a book.

I was working when you drew.