Every human being has a【C1】______ arrangement of the skin of his fingers and this arrangement is unchangeable. Scientists and experts have proved the uniqueness of fingerprints and discovered that【C2】______ exactly similar pattern is passed from parents to children, though nobody knows why this is the case. The ridge structure on a persons fingers does not change with growth and is not affected by【C3】______ injuries. Burns, cuts and other damage to the outer part of the skin will be replaced in time by new one which【C4】______ a reproduction of the original pattern. It is only when the inner skin is injured【C5】______ the arrangement will be destroyed. Some criminals make use of this fact to remove their own finger-prints,【C6】______ this is a dangerous and rare step to take. Finger-prints can be made very easily with printers ink. They can be recorded easily. With special methods,【C7】______ can be achieved successfully within a short time. Because of the simplicity and economy of this system, finger-prints have often been used as a method of solving criminal【C8】______ . A suspected man may【C9】______ a charge but this may be in vain. His finger-prints can prove who he is even if his【C10】______ has been changed by age or accident. 【C1】