The veteran investigative reporter had no memory of ______ that anonymous source during the corruption probe.
Answer and explanation
Correct answer: C. having interviewed
- Step 1: The noun 'memory' followed by the preposition 'of' requires a gerund complement. The perfect gerund 'having interviewed' emphasizes that the potential action took place in the past. Answer: having interviewed. Why not the others: "to interview then" uses an infinitive complement, which cannot follow the preposition 'of'; "to have interviewed" uses a perfect infinitive where a prepositional gerund complement is required; "interviewed once" is a past participle form that cannot function as the grammatical object of 'of'.
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