问题
选择题
She and her family hid away for nearly twenty-five months _____ they were discovered.
A．After
B．since
C．until
D．before
答案
答案：D
时态分析：考查before用法。Before在…之前；在句中中要灵活的翻译。句意：在她们被发现之前她和她的家人隐姓埋名了几乎25年。故D正确。
点评：Before在…之前；在句中中要灵活的翻译。同时也要注意before的一些固定句型。