Why not try to persuade him to give up smoking?
Why don’t you go ask the teacher?
B: Sure, why not?
Teacher: I’d like you to introduce the guest speaker at the student assembly today.
Student: Why me? I can’t do that.
Teacher: Why not? You’re a good student and I think you will do a great job.
Student: But I’ve never spoken in front of so many people before. I wouldn’t know what to say.
Teacher: Don’t worry. I’ll help you prepare the speech. Why not give it a try?
Student: OK, I guess I have nothing to lose.