The pig is surfing _ the wave.
on
The turtle is running _ the beach.
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The bird is eating _ the tree.
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The mouse is whistling_ the boat.
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The cat is sitting __ the car.
in
The fish is swimming _ the water.
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The dog is sleeping _ the house.
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The snake is crawling _ the jungle.
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The squirrel is sniffing _ the North pole.
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The lion is laying _ the bed.
in