One day a dog finds a bone.
He takes the bone up in his mouth and runs to the river.
There is a plank across the river. As the dog runs across the plank, he looks down into the water and sees a dog in the river.
"There is a dog in the water," he says. "That dog has a bone in his mouth. I will take that bone.
Then I will have two bones."
The dog opens his mouth, and the bone falls into the water.
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finds a bone - находит кость
in his mouth - в рот
to the river- к реке
a plank across the river - дощечка через реку
as - в то время как