英语谜语十 Riddles10

41.What person does every man take his hat off to?
42.What can you swallow than can also swallow you?
43.Which three letters can frighten a thief away?
44.What appears once in every minute,twice in every moment, but not once in thousand years?
45.What would you say if you saw a ghost(鬼)?
46.Which is the left side of a cake?
47.A police saw a truck driver going the wrong down a one - way street,but paid no attention to him.Why?
48.Where should the milk be best stored ?
49.What is the hardest thing about learning to ride a bicycle?
50.What always has one eye open but can't see?