中学英语语法选择题 检举 | 13 分钟前 提问者： 奶咖中の兔兔酱 | 浏览次数：22次
It____quite a few years_____the accused was declared innocent and set free.
A.was,since B.is that C.will be,when D.was before
答：D
译：过了好几年才宣布被告非罪释放.
析：本题考句型It was some time before sth. happened.过了多久才发生某事.
这里的some time 为quite a few years, 增加了句子理解的难度.
用since 的句型是：it is (=has been) some time since sth. happened. 自某事发生以来,已经多少时间了.
用when的句型是：it was 时间点（如1997） when sth. happned. 某事发生时,时间是1997年.
用that是强调句型：It was 时间状语（如in 1997) that sth. happened. 为sth. happned in 1997.之强调时间状语.
C项显然是错误的,那个是before的将来用法：
it will be some time before sth. happens. 要过多久才会发生某事.