It ( ) quite a few years ( ) the accused was declared innocent and set free. ( 章节：8 难度：3)_做题室

单项选择题It ( ) quite a few years ( ) the accused was declared innocent and set free. ( 章节：8 难度：3): A、was; since; B、is; that; C、will be; when; D、was; before

正确答案：D
答案解析：
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