Entering the room, I found Mary at the desk and a letter.
A. seated; wrote
B. sitting, written
C. seating; writing
D. seated; writing
网友回答
A. seated; wrote
B. sitting, written
C. seating; writing
(答案→)D. seated; writing
解析：句意:我进入房间，发现玛丽正坐在书桌旁写信。find+宾语+宾语补足语(doing/done). 宾语Mary与补足语之间是主动关系，因此第二空用现在分词writing。seated “坐着的”表示主动，因此第一空用sitting或seated.故选 D。