1. Who does this pen belong to?
(Chiếc bút này thuộc về ai?)
2. I am sorry for not having rung him earlier.
- sorry for something: xin lỗi vì việc gì
3. Don't pretend to be ill if you're not.
4. Keep this information to yourself.
- keep something to yourself: giữ bí mật
5. As a boy, he used to be a regular churchgoer.