Work in pairs. Write down the to-infinitive in the sentences you found in 4 in GETTING STARTED. Pay attention to how the infinitives are used. 

Mai: I can see that you and Hoang Minh have become close friends, Lan.

Lan: We have. I really like him because he doesn't rely on other people for help and isn't influenced by other people's opinions.

Mai: I see. So he's very independent.

Lan: Yes. He's also a very responsible student. He always completes his tasks on time, and never needs to be reminded about assignments and other schoolwork.

Mai: Right.

Lan: He's also reliable. Last week, our group worked on a project and he was assigned the most difficult part of it. He tried very hard and did it well.

Mai: It's good to have a friend you can rely on. He seems very determined.

Lan: He is. Last month, we were given a very hard Maths problem. While most of us gave up, he spent the whole night on it and solved it in the end.

Mai: That's amazing!

Lan: Yeah. Even our Maths teacher was very surprised to read his answer. Another good thing about him is that he's self-reliant. He always tries to find solutions to his problems and seldom needs help from others.

Mai: His parents must be really pleased to have such a son.

Lan: Of course. He also helps around the house a lot. But he still has time to read, so he's well-informed about what's happening around the world. It's interesting to talk to him.

Mai: I'll talk to him sometime.

Lan: Yes, you should. He's also very confident and decisive. He always believes in himself, and I really admire his ability to make decisions so quickly. He's a very independent person!

Mai: That's great! You're lucky to have a close friend like him.