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.

If one were to equate the body with a machine, he would do well to remember that a well-oiled and a well-kept machine lasts much longer than another machine that undergoes no preventive maintenance.