Difficulty: Easy
Correct Answer: had rung
Explanation:
Given data
Concept/ApproachUse past perfect to show an action completed before another past action: "had rung … before I answered."
Option analysishad rung — correctly marks the earlier action finished before answering. ✅was ringing — past progressive; suggests ongoing action at the time of answering, not "before." ❌has rung — present perfect; ties to present time, not a past narrative. ❌would ring — habitual or future-in-the-past; not the given meaning. ❌
Quick checkTemplate: Had + past participle … before simple past.
Final Answerhad rung
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