For questions 21-25, choose the answer (A, B or C)which best completes each sentence.
Mark your answer on the answer sheet.
There is an example at the beginning (0).
The Abacus
The abacus was used (0) in ancient times to perform basic arithmetic operations.Businessmen have used it for centuries to perform basic calculations for their routinebusiness. Nowadays the abacus is also used as a toy by children. They see it quite often and arefamiliar with it. When children are asked to learn to calculate on their abacus, they feel like they are playing and
this way they learn a lot. They like its shape; it makes them feel good and they are not
while learning. The use of the abacus
a teaching tool has become rare in the past few years. It is still used in some Asian and Latin American countries but
to the constantly changing technology of the world it
old-fashioned. Even now with electronic calculators, the abacus stands as an important tool for simple arithmetic.
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