Use passive voice dinner always (cook) by my mother what butter ( make) from? the book (write) last year when the tower of london (build)? the rainbow can (see) in the sky after rain

Dinner is always cooked by my mother
What is butter made from?
The book was written last year
When was the Tower of London built?
The rainbow can be seen in the sky after rain

Dinner is always (cooked) by my mother.
What is butter ( made) from?
The was book (written) last year.
When was the Tower of London (built)?
The rainbow can (seen) in the sky after rain.