问答题 请你以学校青年志愿者(young volunteers)的名义，根据下面内容拟一篇广播通知。
时间：3月12日，植树节(Tree Planting Day)；
地点：北京奥林匹克公园(Olympic Park)；
抵达方式：乘校车；
出发时间：上午7:30，在学校图书馆前；
活动内容：1．组织青年志愿者植树，为把北京2008奥运会办成绿色奥运会做贡献(make one's contribution to)；
2．自带铁铲(spade)、水桶(bucket)；
返回时间：上午11:30，在公园门口集合。

【正确答案】One possible version
Attention please, everyone!
I have something important to tell you. Tomorrow is March 12th, and is Tree Planting Day. In order to make our own contributions to the 2008 Green Olympics, the young volunteers in our school decided to go to the Olympic Park to plant trees. Remember to take not only a spade but also a bucket and wait in front of the school library before 7:30. We'll go there by school bus together. After work, we'll come back at 11,30, please get together at the gate of the park on time.
That's all! Thank you!
【答案解析】