There are many superstitions in Britain, but one of the most 【C1】______held is that it is unlucky to walk under a ladder—even if it means【C2】______ the pavement into a busy street! 【C3】______you must pass under a ladder you can【C4】______bad luck by crossing your fingers and【C5】______them crossed until you have seen a dog. 【C6】______ , you may lick your finger and【C7】______a cross on the toe of your shoe, and not look again at the shoe until the 【C8】______ has dried. Another common【C9】______is that it is unlucky to open an umbrella in the house—it will either bring 【C10】______to the person who opened it or to the whole【C11】______. Anyone opening an umbrella in fine weather is【C12】______ , as it inevitably brings rain! The number 13 is said to be unlucky for some, and when the 13th day of the month 【C13】______on a Friday, anyone wishing to avoid a bad event had better stay 【C14】______. The worst misfortune that can happen to a person is caused by breaking a mirror, 【C15】______ it brings seven years of bad luck! The superstition is supposed to 【C16】______ in ancient times, when mirrors were considered to be tools of the gods. Black cats are generally considered lucky in Britain, even though they are 【C17】______witchcraft. It is 【C18】______ lucky if a black cat crosses your path—although in America the exact opposite belief prevails. Finally, a commonly held superstition is that of touching wood 【C19】______luck. This measure is most often taken if you think you have said something that is tempting fate, such as "my car has never 【C20】______, touch wood 【C14】