英語閱讀完形填空
一、Do you know how people in the early days did their counting?It is very i(  ) ,At   that time,people c(  ) not count very well.Their method of counting was simple .At first all counting was done w(  )stones.L(  )they learned to use their fingers in counting.We all have ten fingers, so the n(  ) ten became tht foundation of all counting in all p( ) of the world.This decimal way of counting led to our present method of reading and writing numbers.