问题描述：
he was picked u____ and put into a dog pond.
they have a very g____ memory.
but how long it t____ for a baby elepant to be born--- mayme 21 m_____.
they have a very g____ memory.
but how long it t____ for a baby elepant to be born--- mayme 21 m_____.
问题解答：
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