Сделать в пассиве войс before i came home, my mother had cooked the supper

Перед тем как прийти домой моя мама приготовила суп

Before I came home, the supper had been cooked by my mother.

The Monument to the Great Fire of London, usually known as the
Monument, is a stone column in the City of London. It was devoted to
commemorate1 the Great Fire of London which happened in 1666. The monument shows a high column with a ball with flames on its top. It was
 built by Sir Christopher Wren. Tourists can reach the top by a
staircase of 311 steps. At the end of the 18th century it was the highest in London. Three sides of the base carry information in Latin. The one
on the east describes how the monument was built. The words on
the north side describe how the fire started and how much damage it
taken . The south side describes actions designed by Charles II
following the fire. The west side of the base displays a sculpture which is
 brought to the City of London after the Great Fire.

The Monument to the Great Fire of London, usually known as the
Monument, is a stone column in the City of London. It was devoted to
commemorate1 the Great Fire of London which happened in 1666. The monument shows a high column with a ball with flames on its top. It was
 built by Sir Christopher Wren. Tourists can reach the top by a
staircase of 311 steps. At the end of the 18th century it was the highest in London. Three sides of the base carry information in Latin. The one
on the east describes how the monument was built. The words on
the north side describe how the fire started and how much damage it
taken . The south side describes actions designed by Charles II
following the fire. The west side of the base displays a sculpture which is
 brought to the City of London after the Great Fire.