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题目内容
（合肥财经职业学院-机电一体化技术）
They talked in whispers, but still, I couldn’t help but __________ their conversation.
A、overhear
B、to overhear
C、overhearing
D、overheard
A、overhear
B、to overhear
C、overhearing
D、overheard
参考答案
