It is true that paper can not last long. But is there any __1__ that would last as long as __2__ as and as easy to write __3__ as paper? The Babylonians discovered just such a material. Recently an Englishman unearthed(出土) a large library of a king of  Babylonia, whose __4__ were made of clay(泥土) .

This is the __5__ in which these books were made. They first made a sheet of clay of the proper size and thickness, and __6__ on it with a sharp stick. These books of clay, after they had been dried and __7__ in an oven (炉灶) , could last almost as long as stones. Such books will not burn up in a fire _8__ be spoiled by wetness; pieces can be gathered (搜集)up and __9__ together properly. The English __10__ to work a long time with broken sheets discovered there before he __11__ them all put together properly.

There were 30,000 sheets in the library. Every book was made __12__ many sheets, as our books have many __13__. It was, of course, impossible to stick them together as we __14__ now with our books. So all the clay sheets had to be __15__ and the name of the book placed on every one.

1. A. paper      B. material(材料)  C. book        D. cloth

2. A. bamboo    B. wood               C. plastics       D. stone

3. A. on        B. for              C. with         D. in

4. A. covers     B. houses           C. walls        D. books

5. A. skill       B. way             C. story        D. means

6. A. painted        B. cut             C. pointed      D. wrote

7. A. fired       B. wrapped(裹着)    C. cleaned      D. smoked

8. A. so         B. also             C. nor          D. not

9. A. sewn      B. thrown          C. put          D. kept

10. A. wanted   B. had             C. stopped      D. remembered

11. A. did       B. got             C. turned       D. started

12. A. from      B. by              C. of           D. up of

13. A. pages     B. words           C. sentences     D. leaf

14. A. made     B. tie              C. hold         D. do

15. A. counted   B. copied           C. numbered        D. painted

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