（一）分子式的确定：

一个池塘中的全部鲫鱼组成了一个（ ）

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几时几分____：____

几时几分____：____

阅读理解

      There are many festivals (节日) in our school. This month is October. In October, there is a Sports Festival. We have a basketball game and a volleyball game during (在....之间) the festival. In the middle of this month, we have an English test during the English Festival. October the nineteenth is the day for a school trip; we go to Beijing with the teachers. On the last day of this month, there is a Music Festival. On that day we can enjoy beautiful songs, dances and piano music. It is really wonderful. Next month, there is an Art Festival. Students often display(展示) their pictures on that day.