题目内容：

根据句意和汉语注释，写出单词的正确形式。

1.Trust me. I’ll keep it between you and me, I        (承诺).

2.When an earthquake happens, we should run to        (安全) as quickly as possible.

3.If you want a        (持久的) change in your life, keep working hard.

4.Life is too busy, sometimes it will let me breathe        (沉重地).