口渴的乌鸦

a crow felt very thirsty. he looked for water everywhere. finally, he found a pitcher. but there was not a lot of water in the pitcher. his beak could not reach it. he tried again and again, but still could not touch the water. when he was about to give up, an idea came to him. he took a pebble and dropped it into the pitcher. then he took another and dropped it in. gradually, the water rose, and the crow was able to drink the water.

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