It quite a few years the accused was declared innocent and set free.A. was; sinceB. is;

发布时间:2020-08-14 23:07:28

It      quite a few years      the accused was declared innocent and set
free.A. was; sinceB. is; thatC. will be; whenD. was; before

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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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