Choose the correct option:
Correct answer: A. They had finished their work, hadn't they?
- A. They had finished their work, hadn't they?
- B. They had finished their work, haven't they?
- C. They had finished their work, didn't they?
- D. They had finished their work, don't they?
Explanation
The main clause is in past perfect tense ("had finished"), and the tag question correctly matches the tense and polarity with "hadn't they?" (positive statement → negative tag).
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Tenses show when an action or state occurs and whether it is complete, continuing or repeated. The work covers present, past and future forms, including simple, continuous, perfect and perfect continuous constructions, as well as sequence of tenses and the difference between tense and aspect.
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