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it,   Climbing the hill,    by the lake，   Children's,    dancing

It's ​ Day. Some children are in the park. They are having a good time.

Some are playing games under a big tree. Some are singing and ​. Some boys and girls are ​ . Others are rowing on the lake.

Look, Tom is sitting ​​ .He is reading. Helen is running after a nice butterfly. She wants to catch . How fun!