单项选择题
The Big Ben (英国大本钟) is located in the tower in London. It is very famous (41) the world, but nobody really knows why it is (42) Big Ben. There are two stories (43) this. Some people say that it was named (44) Benjamin Caunt, a boxer. People called (45) Big Ben. But more people believe it was called after Welshman, Sir Benjamin Hall. He was in (46) of this work in 1859. A story was told that during a (47) in a meeting on what (48) the bell, Sir Benjamin was going to give his ideas when an officer behind him shouted (49) , "Let’s call it Big Ben!" From (50) on it was named Big Ben.
48（）
A.calls
B.to call
C.is called