In China, people had a set of written numerals, named Huama. However, the Chinese numbers in their written form _23__.　 small bars which were placed vertically or horizontally to form patterns.
     Today, the most widely used numbers ____24.____ the Hindu-Arabic system, which 　25.　 these familiar symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. This base-10 system was first developed in India and introduced into Arabic culture in the 9th century. Almost everyone agrees that 10 was chosen because human beings 　26.　 10 fingers and 10 toes. People long ago used their fingers to count up to 10—as we still do today. So, any number can 　27.　 by using different combinations of the 10 symbols.
【題組】23.
(A) were made up of
(B) was composed of
(C) were consisted of
(D) consisted in