It is believed that before write was developed,

1．________

people in China used to keep records by putting the

2．________

number of stones together．After writing was developed,

3．________

people carved words on animal bones．Later, words carved

4．________

on metal pots．Then people wrote on pieces of bamboo and wood

5．________

and these were tied together to from a book．

6．________

At the same time, other kind of paper was made

7．________

from silk．Because it was expensive, so people invented

8．________

another kind of paper．This kind of paper was so soft

9．________

and light as silk but much more expensive for

10．________

everyday use．