Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct work for each of the blanks
During the last 400 years, most scientists have (17) ________ on mathematics in their development of their inventions or discoveries. However, one great British scientist, Michael Faraday, did not make (18) __________ of mathematics. Faraday, the son of a poor blacksmith, was born in London in 1791 and had no (19) _________ beyond reading and writing.
In 1812 Faraday was hired as a bottle washer by the great chemist Humphry Davy. Later, Faraday became a greater scientist than Davy, making the last years of Davy's life embittered (20) __________ jealousy. Faraday made the first (21) __________ motor in 1821, a device that used electricity to produce movement.
(17) _________
