Question

【题目】He told me that he ________(overhear) the conversation with the coworker about helping the sick woman.

Answer 1

【答案】had overheard

【解析】句意：他告诉我他无意中听到我与同事关于帮助那位生病的女士的对话。overhear发生在过去动作told之前，是“过去的过去”，用过去完成时，故填had overheard。