2. I think that Bill ........... famous one day. * going to be is being will be

Many predictions about the future use the simple future tense, which is often formed with "will." So when you say "Bill will be famous one day," you're expressing a belief about what is likely to happen. Just like how we talk about the future with confidence, you can imagine Bill strutting down a red carpet, lights flashing, everyone's eyes on him—this is the power of "will!" On the other hand, "going to be" is another common way to make predictions, especially when there's evidence or a plan in place. If Bill's working hard on a project that has real potential, you might confidently state, "Bill is going to be famous one day!" It shows you're not just dreaming; you've got a hunch based on what you currently see!