指示代词that，可以用来指代已提到的或已知的人、物、事件。具体说，它可以指代前文提及的名词、代词、从句、单句、并列句甚至复合句等。红色部分就是that 指代的成分：

If the man is only interested in your looks, that just shows how shallow he is.

如果男人只对你的外表感兴趣，那就说明他是多么肤浅。

—Let me pour you a glass of coffee. 给你倒一杯咖啡吧。

—That would be very nice. 那太好了。

Kevin broke the glass, but he didn't admit it and that was very annoying.

凯文打碎了玻璃，自己还不承认，真是太气人了。

I wish I could be there to celebrate your birthday with you, but that is impossible. 

我非常希望能参加您的生日庆祝会，但是我来不了。