Grammar - Passive Voice 2

Rewrite the sentences, beginning as shown, so that the meaning stays the same. Put in commas where necessary. EXPLANATION
1) We had eaten all the breakfast before we finished the conversation.
All the breakfast
2) The Great Fire of London in 1666 consumed about four-fifths of the City.
About four-fifths of the City
3) Someone was taking photographs during the ceremony.
4) The student delegation will meet the Queen at the airport.
The Queen
5) We serve all main courses with salad or seasonal vegetables.
All main courses
6) People ought to make lessons more interesting for young children.