could, couldn’t or was, were able to

A girl fell into the river but fortunately we ________ rescue her.

I_______ walk when I was less than a year old.

My grandfather _______walk without any help last night.

_______ you understand what he was saying?

My grandmother ________ speak Spanish.

Suddenly all the lights went out. We ________see a thing.

The computer went wrong, but luckily Emma ________ put it right again.

There was a big party last night. You ______ hear the music half a mile away.

I learnt to read sheet music as a child. I ______ read it when I was five.

People heard warnings about the food, and they _______move out in time.