Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks

All men should study, we have to study to (1)_____ our knowledge and develop our intelligence. An educated man can only utilize his bodily strength to work and live. An educated man, (2)_____this strength, still has the faculty of his intelligent brain and good reflection. This intelligence and thought (3)_____ him to help his physical strength to act more quickly and cleverly. In a same profession or work, the educated man differs (4)______ the uneducated considerably. Therefore, intellectual workers have to study, this is a matter of course but manual workers must also again an education. In civilized countries compulsory education has been applied. Everyone must spend seven or eight years to study. From ploughmen to laborers in these (5)_____, no one is unable to read a book or a paper fluently.

All men should study, we have to study to (1)_____ our knowledge and develop our intelligence.