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.

Numbers in Mathematics are strictly and purely impersonal and objective, and our teacher strictly follows the rule that the first structure should be not only close but also independent from the second.