In these contexts, I don't know how to ask a question to emphasize a fact. What tense or modal verb should I use( instead of ---marks)?
1)He is the son of a millionaire. He doesn't have to work. Why -- he work? (I want to say there's no good reason for him to work)
2)I have studied English for years and I'm going to take the TOEFL test. I have no reason to be worried about the test. Why--- be worried about it?
3) My girlfriend has cheated on me several times. I'm going to break up with her. Why ---I trust her again?(I want to say it's absurd to trust her again. I have no good reason to trust her again)