A few days before a big social-science exam, the instructor informed us that he would hold an optional review session the next day.
在一场大型社会科学考试前几天，导师通知我们第二天他将会给我们上一节选修复习课。
A few days before a big social-science exam, the instructor informed us that he would hold an optional review session the next day.
在一场大型社会科学考试前几天，导师通知我们第二天他将会给我们上一节选修复习课。
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