________ that she was going off to sleep, I asked if she'd like that little doll on her bed.
A.Seeing
B.To see
C.See
D.Seen
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A解析考查非谓语动词。首先排除C，因为是动词原形，A项是现在分词表示主动，进行；B项为不定式结构；D项为过去分词表被动，完成。从题干很容易判断本题考查的是非谓语动词作状语，它的逻辑主语是I，和非谓语动词之间是主动关系，故选A。B项不定式在时态上表将来。本题易。