题目内容
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
D
解析:
如将A项中was, since改成is, since是正确的;即从句中谓语先发生。如用B项,是强调句,而强调句前后两个谓语动词在时间上必须一致(a);被强调部分能还回原句中(b),即因为句中was declared是过去时, B项中is改成was;因为句中was declared是非延续性动词,在years后加上ago将"一段" 时间变成"一点"就是正确的。C 项前后时间不一致。
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