In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each number.

Comprehension:
Archaeologists believe that counting large quantities (1) __________ about 10,000 years ago. Early farmers had to (2) __________ for communally stored crops. Early counting systems involved small tokens which represented farmers' stores. In the area which is now southern Iraq, little figures shaped like discs, balls, and pyramids (3) __________ used in about 7500 B.C. to represent various holdings. Later, marks which represented the figures were (4) __________ on clay tablets by use of a blunt reed 10 cut into the wet clay. Still, the symbols were (5) _________ connected with specific merchandise.