It was _____ opportunity to miss.
___ well prepared you are , you still need a lot of luck in mountain climbing.
We’ll have a picnic in the park this Sunday _____ it rains or it’s very cold.
—Did you return Fred’s call?—I didn’t need to ____ I’ll see him tomorrow.
__ unemployment and crime are high, it can be assumed that the latter is due to the former.
______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.