Multiple choice

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. Seldom have the mathematical theories of games been of practical use in playing real games, although our comprehension of the selection process from among variables may have enhanced.

  1. although our comprehension of the selection process from among variables may have enhanced

  2. although our comprehension of the selection process from among variables may have been enhanced

  3. although they may have enhanced our comprehension of the selection process from among variables

  4. although they may have led to enhancement of our comprehension of the selection process from among variables
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Explanation for (1): The two parts of the sentence ought to be in parallel, i.e. in active voice. Here the latter part seems to be in passive voice though it omits 'been' from 'may have been'.

Explanation for (2): The option corrects the error of passive voice by restoring 'been', but is still incorrect as the two parts of the sentence are still unparallel.

Justification for (3): The two parts of the sentence ought to be in parallel, i.e. in active voice. “Seldom have … they may have” in (3) is the best one.
Explanation for (4): The unwarranted addition of 'led to' compounds the error of parallel construction. Explanation for (5): The unwarranted addition of 'general' compounds the error of parallel construction.

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