请抄写下面一段话，请注意大写和标点。
It is Sunday morning. The sun is shining. We have no classes. We are playing in the park. Several girls are singing and dancing under a big tree. Tom is drawing by the lake. Mike and John are rowing a boat in the lake. Where are Betty and Mary? They are sitting under a small tree. They are reading a picture book. We are very happy.
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