题干
It _____ quite a few years _____ the accused was declared innocent and set free.
A：was; since
B：is; that
C：will be; whe
D：was; before
答案(点此获取答案解析）
D
A：was; since
B：is; that
C：will be; whe
D：was; before
知道的目标前进的特征。”这里强调的实践的特征是 （ ）