Before the invention of written numbers，people used（A） lots of different ways to count things.
    At first，people used their fingers，and（B） _________ their toes.However，（C）他們僅僅能數(shù)很小的數(shù)字in this way.
    After that，they began to make small marks on sticks and bones.①They used them to count things like the days of the month，the amount of food and the number of animals they had.
    Then people began to use tokens made from clay or small stones.②
    （D） They often put the tokens on pieces of string in order that they could carry them around easily.This developed（E） _________ tools like the abacus ③.
    （F） In the end，people began to develop systems of written marks to show different numbers，and this led to the Hindu-Arabic system（0-9）we still using this system today.

（1）寫出文中（A）和（F）處的同義詞或近義詞：

many

many

；

Finally

Finally

（2）分別在文中（B）和（E）的空白處填入一個(gè)適當(dāng)?shù)脑~

even

even

；

into

into

（3）將畫線部分（C）譯成英語(yǔ)。

They could only count small numbers

They could only count small numbers

（4）將畫線部分（D）改寫成：
They often put the tokens on pieces of string

so that

so that

they could carry them around easily.
（5）在文中①②③選出能夠填入"This helped them count bigger numbers"的位置：

①

①