选择题：When she was awake , she found that she was standi

题目内容：
When she was awake , she found that she was standing on _____ seemed to be a piece of stone(本题5.0分)
A、 that
B、 which
C、 what
D、 it
参考答案：【答案仅供学习，请勿对照自行用药等】