Open the brackets to use the correct tense. The Lion and the Mouse

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Once when a lion, the king of the jungle, was asleep, a little mouse.
Began running up and down on him. This soon awakened the lion, who
Placed his huge paw on the mouse, and
Opened his big jaws to swallow her. "Pardon, O King!"
Cried the little mouse. "Forgive me this time and I never
Forget your kindness. And who
Knew, I may
Be able to do you a good turn one of these days!" The lion was so surprised by the idea that he
Let her go.
Some time later, a few hunters captured the lion, and
Tied him to a tree. After that they
Went in search of a wagon, to take him to the zoo. Just then the little mouse was passing by and
Saw the lion. She
Ran up to him and gnawed way the ropes with her sharp teeth.
"Am I not right?"
Said the little mouse, very happy to help the lion.