18．I heard somebody playing piano in next room. A. a; a B. the; the C. ——青夏教育精英家教网—

摘要：18．I heard somebody playing piano in next room. A. a; a B. the; the C. a; the D. the; an

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I heard somebody playing ________ piano in ________ next room.
A.a; a B.the; the C.a; the D.the; an

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