The chance of it being sunny tomorrow is very low. LIKELIHOOD There’s very little _____ out tomorrow.
likelihood of the sun coming (/being)
I think it’s very possible that a famous movie star will become president in the future. WELL In the future, a famous actor _____ president.
could/might/may well become
Skateboarders almost always get hurt from falling onto hard surfaces. BOUND When skateboarding, people _____ themselves when they fall onto the hard floor.
are bound to injure/hurt