Digital PSAT Reading and Writing Practice Question 174: Answer and Explanation

Question: 174

Once completely oblivious of the damages to the environment caused by pollution, waste, and overpopulation, the world _________ to look seriously upon the depletion of our natural resources. Whether we scrutinize the harmful exhaust gases that pollute our air-carbon dioxide, sulfur dioxide, ammonia, among others-or turn to deforestation and chemical effluents, the situation is clearly out of control.

Which choice completes the text so that it conforms to the conventions of Standard English?

  • A. had now began
  • B. has now began
  • C. has now begun
  • D. have now begun

Correct Answer: C

Explanation:

(C) The sentence that follows indicates that this essay is written from the present-day perspective. Choice (C) correctly uses the present perfect tense, has now begun, and is numerically consistent with the singular subject of "world." Choices (A) and (B) improperly use began in the perfect tense (began is for the past tense), and choice (D) is plural.

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