The function of given words in the different sentences provided would be as follows:
17). - d). Noun
18). - c). Preposition
19). - a). Adjective
20). - c). Conjunction
21). - a). Noun
17). Noun are described as the words that are employed to refer to the name of an individual, object, etc.
Since 'Ragtime' in sentence 1 denotes the name of a style or pattern of music, it would be considered as a 'noun.'
18). Prepositions are the words that denote association of a noun, noun's referrent(pronoun), or even phrases to the sentence's other components.
In sentence 2, 'until' is linking the phrase 'the end...War' to the previous part of the sentence, it is the preposition.
19). Adjectives are the words that are used only to add detail or description to the sentence by qualifying a noun.
In the sentence 3, 'ragtime' is the adjective as it modifies 'music,' the noun, by adding description about it.
20). Conjunction are characterized the expressions that help link two words, clauses, or often phrases in a sentence.
'And' in the sentence 4 is joining the two band names 'New Orleans' and 'Memphis' and hence, it is the conjunction.
21). In the sentence 5, 'cakewalk' is the noun at the object's place that give the name to the famous dance style towards the century's end.
Learn more about 'Parts of Speech' here:
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