When I entered the room, I found Mary at the desk her homework.A. sat; doing B. sitting;

When I entered the room, I found Mary at the desk her homework.
A. sat; doing
B. sitting; to do
C. seating; to do
D. seated; doing

A. sat; doing B. sitting; to doC. seating; to do(答案→)D. seated; doing解析： 考查非谓语动词。第一个空考查过去分词作宾补， seat动词“坐”没有现在分词形式，故用 seated，第二个空用doing做伴随状语。故选D。句意：当我进入房间的时候，我发现玛丽坐在桌旁，做作业。

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