Answer and explanation

Correct answer: B. I had studied

  1. Step 1: This is a reported (indirect) question, so it uses statement word order with no auxiliary inversion. Step 2. The reporting verb is past, so the earlier action takes the past perfect. Answer: I had studied. Why not the others: 'had I studied' and 'did I study' use question word order; 'I have studied' keeps a present-perfect tense that does not shift back.

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She asked me where the… | Iraqi National English Proficiency Test (INPT)