Question

form a sentence with "once and once again"​

Answer 1

once -

All at once a light flashed out from the building.

once again-

Once again , the train was late.

Answer 2

Sentences with "once" :

》Once there lived a man in this house.

》Once he was very cruel but now he is kind.

》Once the enzyme finds its recognition sites it binds to the DNA.

》All of Once, he decided to leave.

Sentences with "once again" :

》Once again he asked sorry from his mother.

》He was late once again.

》Do you want to try it once again?

》Once again she was out of her anger.