1. I think it *could* rain today - look at the sky.
2. This *can't* be for me - I don't like nature magazines.
3. You *must* be really happy with your new pet dog!
4. That animal *could* bite you - watch out!
5. It looks like a dog, but it lives in the forest. It *might* be a wolf.
6. Everyone's wearing hats and coats. It *must* be very cold.
7. I can't find my books, but they *might* be at school.
8. It *can't* be a fox. It's the size of a small horse!