题目内容：
根据下列文字，回答题。How men firstlearnedtoinventwordsis unknown;(31) __________, the origin of language is a mystery. All we really know is that men, unlike animals, somehow invented certain (32)__________ to expressthoughtsandfeelings,actionsandthings, (33) __________ they could communicate with each other; and that later they agreed(34) __________ certain signs, called letters, which could be (35) __________ to representthose sounds, and which could be (36)__________.Those sounds, whether spoken, (37) __________ written in letters, we call words.
The power of words, then, lies in their (38)__________the things they bring up before our minds. Words become(39) __________withmeaningforusby experience;(40) __________ the longer we live, the more certain words(4l)__________to us the happy and sad
events of our past; and the more we (42) __________, the more the number of words that mean something to us
(43)__________
Great writers are those who not only have great thoughts but also express these thoughts in words which appeal (44) __________ to our minds and emotions.
This (45) __________ and telling use of words is what we call(46) __________ style. Above all, the real poet is a master of (47) __________. He can convey his meaning in
words which sing like music, and which (48)__________ their position and association can (49) __________ men to tears. We should, therefore, learn to choose our words carefullyandusethemaccurately,ortheywill (50) __________ our speech or writing silly and vulgar.回答第31空。 A．in addition
B．in other words
C．in a word
D．in summary
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