问题补充:
It was when she was sleeping in her bedroom a thief broke into the house.
A. which
B. that
C. where
D. than
答案:
A. which
(答案→)B. that
C. where
D. than
解析:句子去掉It was和之后,剩下a thief broke into the house when she was sleeping in her bedroom.是一个完整句子,所以原句是强调句型,选B。