（2006全国Ⅱ，9）It was not until she got home ________ Jennifer realized she had lost her keys.

A.when

B.that

C.where

D.before

答案及解析： B

解析：

句意：直到到了家，珍妮弗才发现钥匙丢了。在高中英语中not和until只能在两种情况下紧挨着出现：①强调句型中；

②倒装句型中。在其他情况一律用not…until…，所以此句还可以改写为：Jennifer didn't realize she had lost her keys until she got home./Not until she got home did she realize she had lost her keys.