the local community of Grand Island，Nebraska.”可知B选项不正确；根据第一段的“The festival is an annual event for fourth and fifth graders of Nebraska.”可知C选项不正确；根据第一段的“Water magic，folk singers...There are also some educational activities”可知D选项正确。
7．选A。根据第一段的“It is an interesting and energetic day filled with hands-on education.”可知这个节日举办的时间只有一天。
8．选B。倒数第二段主要讲述的是这个节日不仅影响了内布拉斯加州人，而且还影响了美国其它州乃至其它国家和地区的人，四个选项中只有B表达了这层含义。 9．选D。根据Taster's Choice中的“...from tap water to bottled water.Then they are taught about the treatment process of each type of water.”可知这个活动能够让孩子了解每一种水是经过怎样的处理后才能饮用的。
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