Read the following dialogue and answer the question.

Aleen: Have you had your lunch?

Brenda: No, I haven't eaten anything (1) .... I am too busy finishing my project.

Aleen: Do you want to eat with me now?

Brenda: Give me 10 minutes, okay?

Aleen: Let me help you. I am starving to death.

Why has Brenda not had her lunch?