Past Continuous: When/While clause

My father was reading a book, ___ my mother was looking at the family album.

I was having a shower, ______ my friend broke my mother's favourite vase.

Some students were arguing with each other ___ the teacher came into the classroom

I arrived home, ______ all the guests were having tea and biscuits.

She was visiting her relatives with her mother ___ she was a little girl

I was working in group and pairs, ___ I was a secondary school student.

______ Sue was waiting for the 12 o'clock train, she met an old friend.

The Persons were having a large breakfast, ______ the doorbell rang.

My father was waiting in the car, ______ my mother was doing shopping.

What were you doing ______ the teacher looked at you suddenly?