lt，is後面加什麼

1、lt is about time.-And it's a significant raise too!是時間該告訴我們了.-這可是一個重要的升遷！

2、lt is the decision of this committee.這是委員會的決定.

3、lt is an historic day.今天意義非凡

4、It is important for us to study English.學習英語對我們來說特別重要。