例句：
We've only to advertize to get a mob of people after it.
我们只要登一个广告出去，就会引来一大堆人要它。
Should I call him and apologize?
我是不是应该打电话向他道歉？
I felt (that) I had to apologize.
我以为我得道歉。
O.K. I made a boo-boo. I apologize.
好吧。我犯了一个低级错误。我道歉。
Why should I apologize?
我为什么要道歉？