It was not until she got home Jennifer had realized she had lost her keys.
A. where
B. that
C. when
D. before
网友回答
A. where
(答案→)B. that
C. when
D. before
解析：这是强调句型，其结构是：It was+被强调部分+that/who+其他。判断强调句型的方法是把It was that这三个词去掉，整个句子不缺成分，意思完整。当被强调部分是until+状语时，要把主句中的not一起放在被强调部分。故选B。