Choose the best option to fill each of the blanks to make a meaningful passage:

            Most people think of computers as very modern inventions, products of our new technological age. But actually the idea for a computer was (1) _______ out over two centuries ago by a man (2) _______ Charles Babbage.

Babbage was born in 1791 and (3) _______ up to be a brilliant mathematician. He drew up plans for several calculating machines (4) _______ he called “engines”. But despite the fact that he (5) _______ building some of these he never finished any of them. Over the years people have argued (6) _______ his machines would ever work. Recently, however, the Science Museum in London has finished building (7) _______ engine (8) _______ on one of Babbage’s. designs.
            It has taken six years to complete and more (9) _______ four thousand parts have been specially made. Whether it works or not, the machine will be on show at a special exhibition in the Science Museum to (10) _______ people of Babbage’s work.

(1)..................

• A. 
  turned
• B. 
  thought
• C. 
  invented
• D. 
  worked