Sometimes we go upstream to a favourite backwater, sometimes we haveour party at the boathouse, which a predecessor of ours at the farm built in themeadow hard by the deepest pool for swimming and diving. In a heat wave wechoose a midnight birthday party and that is the most exciting of all. We welcome theseasons by the riverside, crowning the youngest girl with flowers in the spring,holding a summer festival on Midsummer Eve, giving thanks for the harvest in theautumn, and throwing a holy wreath into the current in the winter.

　　7.Sometimes we go upstream to a favourite backwater, sometimes we have our partyat the boathouse, which a predecessor of ours at the farm built in the meadow hardby the deepest pool for swimming and diving.

　　有时，我们溯流而上来到我们喜爱的回水河汊举办;有时在船坞举办。那船坞是农场一位前辈在一块草地上盖的，草地紧挨着一个专供游泳、跳水的深水池。

　　语言点:句子结构分析:两个sometimes后面是两个并列关系的主句，由逗号隔开，这种用法比较少见。

　　8.In a heat wave we choose a midnight birthday party and that is the most exciting ofall.

　　天气炎热时，我们便选择在半夜举办生日聚会，这种聚会是最令人激动的。

　　语言点:句子结构分析:heat wave的意思是“热浪。”that指代前面的部分。

　　9.We welcome the seasons by the riverside, crowning the youngest girl with flowersin the spring, holding a summer festival on Midsummer Eve, giving thanks for theharvest in the autumn, and throwing a holy wreath into the current in the winter.

　　我们在河边迎接一年四季。春天在河边为最年轻的姑娘戴上花冠，夏天在河边欢庆“仲夏前夜”，秋天在河边丰收而感恩，冬天往河中抛撒一个冬表花环。

　　语言点:句子结构分析:请特别注意句中crowning,holding,giving,throwing形成的平行结构。