0Articles are omitted in expressions that have 01b 00opposites02b 00 or words that can be likened to opposites:02br 01i 00from east to west, from morning till evening02i 02br 01i 00Salesman 02i 00and 01i 00opera singer02i 00 aren't really opposites but the author has chose to omit the articles just the same. That is his choice, using the articles in your example is very correct grammar. 02br 00CB 0-
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