Answer:
2. It's happening imminently! Don't blink or you'll miss it! So it's continuous.
Look! Junko is jumping into the water.
3. Both are ok. I assume they want the more natural:
I think you're crazy!
4. If she was hating it, it would mean that she's already eating the cheese and having a very bad time.
Don't give Jan any cheese. She hates it!
5. When describing plans, we use the continuous form.
I'm going to Toronto next Thursday. ...
