问题描述：
请英语高手帮我解答难题
单选并说明理由且翻译这句话
He found Irene____at the piano with her hands on the keys( A.seating B.seated C.seat D.to seat)
单选并说明理由且翻译这句话
He found Irene____at the piano with her hands on the keys( A.seating B.seated C.seat D.to seat)
问题解答：
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