When you visit London,(1)________________________ is Big Ben,the famous clock which can be heard all over the world on the B.B.C..If the Houses of Parliament had not been burned down in 1834, the great clock would never have been corrected.Big Ben takes its name from Sir Benjamin Hall who (2)__________________________ when the new Houses of Parliament were being build.It is not only of immense size but of extremely accurate as well.Officials from Greenwich Observatory have the clock checked twice a day.On the B.B.C.,you can hear the clock when it is actually striking,because microphones are connected to the clock tower.Big Ben has really gone wrong.(3)______________________
A painter who had been working on the tower hung a pot of paint on one of the hands and slowed it down!