A： Hi! Dave． Haven't seen you for a long time． Did you go anywhere interesting？
B： Yes， I did． （1）
A： What did you do there？
B： We enjoyed the beautiful sights in the mountain and ate many kinds of wild vegetables that are offered by the villagers there．
A： Sounds fantastic． （2）
B： We sent some books to the students there． In fact， I felt a little sad when I came into their classroom．
A： Why did you have that kind of feeling？
B： The students there studied in poor learning conditions．（3）
A： Can you tell me what you are going to do？
B： We are going to provide the students with new desks and chairs．
A：（4） I am willing to join you．
A． Many of us have promised to give more help to them． B． My friends and I went to a village this vacation． C． Being a volunteer is really great． D． What else did you do？ |
Before paper was invented，people wrote or drew on materials such as bamboo，
（1） /sɪlk/，animal hide，and wooden blocks．Writing materials were （2） （real）expensive and few people learned to read．Therefore，few people wrote．This all changed，thanks （3） a man named Cai Lun．
Paper had already existed（存在）in China，but the process for （4） （produce）it was difficult and the paper was of low quality．Cai Lun began experimenting（试验）with many different materials and different （5） （method）to turn those materials into paper．In the year 105，he made it from tree bark，bamboo，cloth rags，and fishing nets．His paper was （6） （strong）and cheaper than any paper that had been made before．
With Cai Lun's papermaking method，Chinese culture （7） /gru：/ more rapidly over the next several centuries．That's because ideas were much easier to share （8） more people learned to read．The use of paper spread abroad，helping （9） /'ʌðə/ cultures record and spread their ideas．Today，Cai Lun is considered a national hero in China．But
（10） whole world should remember the clever Chinese papermaker forever．
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