Directions: This question presents a sentence, all or part of which is underlined. Beneath the sentence you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

One of new editions contain the result of three more years of study and experience, enlightened and aided by very many letters from readers, which served to point out flaws in the previous edition.