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P a g e
Ancient people used graphite to sign possession and number of 15 __________ .
The first pencil was graphite wrapped in 16 __________ or animal skin.
In the eighteenth century, the 17_________________ protect the mines when the value
of graphite was realized.
During the reign of Elizabeth I,people was condemnable if they 18 __________ or
receive the “wad”.
Russian astronauts preferred 19 __________ pencils to write in the outer space.
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