Could / Was/were able to

She was very strong. She ______ swim all day and dance all night.
1. could
2. was able to
The car fell into the river. The workers _____ get it out but the driver was dead.
1. was able to
2. could
When I was younger I _____ stay up all night and not get tired
1. could
2. was able to
We had no keys, so we ______ open the door. (negative)
1. couldn't
2. wasn't able to
I looked very carefully and I _______ see a car in the distance.
1. was able to
2. were able to
A boy fell into the sea but luckily we ______ help him.
1. were able to
2. was able to
3. could
My son will never ______ to play the piano
1. is able to
2. be able to
3. could
At four years old he _____ read quite well.
1. can
2. could
I am sorry I ____ come to the meeting next week.
1. can't
2. couldn't
Before he had the car accident, he _____ run very fast.
1. can
2. were able to
3. could