—When did you e back last night?
—It was not until 11 o'clock the party ended.
A. that
B. when
C. where
D. how
网友回答
A. that
B. when
C. where
D. how
解析：答案：B 考查特殊句式。when引导定语从句，省略了强调句的后面成分，完整的句子为：It was not until 11 o'clock when the party ended that I came back.