The following passage has not been edited. There is an error in each line. Write the incorrect word ana
the correction against the correct blank number
Thousands of year ago oil lamps
was used by man. These lamps used
animal fat and vegetable oil to burning.
Before 2000 years ago candles were made
by dipping strands of cotton in animal fat.
Invention of moulded candles extends
their activity beyond day light hours.
Discovery for petroleum gave kerosene as
a fuel. Soon people starts using cast iron oil stoves.
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