The thief ___ caught and the police recovered the stolen goods.

This question tests English grammar, specifically subject-verb agreement and the passive voice. The sentence "The thief ___ caught" requires a singular past tense auxiliary verb because "thief" is a singular subject and the action "caught" is in the passive voice, meaning the thief was acted upon. "Was" correctly forms the past simple passive construction, indicating a completed action in the past. The second clause, "the police recovered the stolen goods," is also in the past simple, maintaining tense consistency.

• "Had" forms the past perfect ("had been caught"), which is incorrect for a simple past event.
• "Has" forms the present perfect ("has been caught"), which is incorrect for a past event.
• "Were" is a plural past tense auxiliary verb, incorrect for the singular subject "thief."