问题补充:
When he was awake, she found she was lying on seemed to be a piece of stone.
A. that
B. which
C. what
D. it
答案:
A. that
B. which
(答案→)C. what
D. it
解析:考查连词。根据 seemed to be a piece of stone 缺主语可知要用what连接从句作was lying on的宾语,what相当于sth that。句意:她醒来时发现自己躺在似乎是石头的东西上面。