{
"1. Four bronze lions ... at the square from the monument.": "look",
"2. It ... Sir Christopher Wren 35 years.": "took",
"3. It ... as a fortress, a royal palace, a prison and the King's Zoo.": "was used",
"4. The Tower of London ... by Julius Caesar.": "was founded",
"5. In the middle of the square there ... a tall column.": "is",
"6. Big Ben ... after Sir Benjamin Hall, the first Commissioner of Works.": "is named",
"7. This monument ... to commemorate Nelson's victory at the battle of Trafalgar in 1805.": "was erected"
}