Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.
How men first learnt to (6) ____words is unknown; in other words, the origin of language is a (7) ____. All we really know is that men, unlike animals, (8) ____ invented certain sounds to express thoughts and feelings, actions and things so that they could communicate with each other; and that later they agreed (9) ____ certain signs, called letters, which could be combined to represent those sounds, and which could be written down. These sounds, (10) ____ spoken or written in letters, are called words. Great writers are those who not only have great thoughts but also express these thoughts in words that (11) ____ powerfully to our minds and emotions. This charming and telling use of words is what we call literary (12) ____. Above all, the real poet is a master of words. He can (13) ____ his meaning in words which sing like music, and which by their position and association can (14) ____ men to tears. We should, therefore, learn to choose our words carefully, (15) ____ they will make our speech silly and vulgar.
A.or
B.so
C.although
D.because