1、lt is about time.-And it's a significant raise too!是时间该告诉我们了.-这可是一个重要的升迁！
2、lt is the decision of this committee.这是委员会的决定.
3、lt is an historic day.今天意义非凡
4、It is important for us to study English.学习英语对我们来说特别重要。
