The report ____ by an independent panel before it was published last month.
Answer and explanation
Correct answer: B. had been reviewed
- Step 1: The review happened before the publication, and both are in the past, so the earlier action needs the past perfect. Step 2. The report did not do the reviewing, so the verb must be passive: had been + past participle. Answer: had been reviewed. Why not the others: 'has been reviewing' is a present perfect continuous active form; 'was reviewing' is active and continuous; 'had reviewed' is active, but the panel is the agent introduced by 'by'.
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