People all over the world write to Big Ben. They even send birthday’s presents, One 81 ______ present was a bottle of oil—to help keeping 82 ______ Big Ben running. Big Ben is a clock in London. Big Ben is the great clock highly up in 83 ______ a tower, the building in London where laws are made there. People like to see Big Ben’s 84 ______ friendly face(The clock has four). They like 85 ______ to hear the chimes(钟声)each 15 minutes. They 86 ______ like to hear the big bell beating the hour. 87 ______ "BONG BONG BONG". Radio sends the noise of the big clock to 88 ______ the rest of the world. The BBC begins to sent 89 ______ chimes in 1923. Ever since, Big Ben had been a 90 ______ radio star.