As a rule, begin each paragraph with a topic sentence, end it in conformity with the beginning. Again, the object is to aid the reader. The practice here recommended enables him to discover the purpose of each paragraph as he begins to read it, and to retain this purpose in mind as he ends it. For this reason, the most generally useful kind of paragraph, particularly in exposition and argument, is that in which (a) the topic sentence comes at or near the beginning; (b) the succeeding sentences explain or establish or develop the statement made in the topic sentence; and (c) the final
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