PSAT Writing and Language Question 693: Answer and Explanation

Question: 693

  • A. NO CHANGE
  • B. have been observed
  • C. had been observed
  • D. is being observed

Correct Answer: C

Explanation:

(C) This is an event that takes place prior to another event in the past, so "had" is needed. Choices (A) and (B) are in the past perfect tense, and choice (D) is in the present progressive tense.

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