【分析】
首先，我们要明确这是一篇英语日记写作题，解题思路分为三步：
1. 确定日记格式：日记开头需要包含日期、星期和天气，根据图片中的“6月15日”，可以设定合理的星期和天气，比如Monday，15th June Sunny。
2. 梳理写作要点：根据题目提示，我们要涵盖这些关键信息：①今天是祖父八十寿诞，家里举办寿宴；②堂哥Jack和父母送了新电视和冰箱；③“我”送传统寿桃；④寿宴上堂妹Lucy唱《茉莉花》，堂姐Ruby弹钢琴伴奏；⑤堂姐Cathy做了美味健康的菜肴；⑥大家都很开心。
3. 组织语言：按照“点明事件-准备的礼物-寿宴活动-结尾感受”的顺序，用通顺的英语将要点串联起来，注意时态的统一，这里用一般现在时记录当天的活动即可，确保语句符合英语表达习惯，不遗漏任何提示要点。
【解析】
1. 日记开头：按照英语日记规范，先写出日期、星期和天气：Monday，15th June Sunny，开篇点明核心事件：Today is the fifteenth of June. It's my grandpa's eightieth birthday. We have a big party for Grandpa at home. All my family members come to the party.
2. 礼物部分：根据提示描述大家准备的礼物：Before the party，we have prepared a lot of presents. Jack and his parents buy a new fridge and a new TV for Grandpa. As for me，I choose the birthday peach for my grandpa.
3. 寿宴活动：依次描述寿宴上的表演和菜肴：At the party，Ruby and Lucy give a performance（表演节目）. Lucy is singing the beautiful song Jasmine Flower while Ruby is playing the piano. Cathy is great too. She cares about Grandpa's health. She cooks delicious and healthy dishes for Grandpa.
4. 结尾总结：写出大家的心情：Grandpa is very happy on his birthday. And we all have a great time together!
【答案】
Monday，15th June Sunny
Today is the fifteenth of June. It's my grandpa's eightieth birthday. We have a big party for Grandpa at home. All my family members come to the party. Before the party，we have prepared a lot of presents. Jack and his parents buy a new fridge and a new TV for Grandpa. As for me，I choose the birthday peach for my grandpa. At the party，Ruby and Lucy give a performance（表演节目）. Lucy is singing the beautiful song Jasmine Flower while Ruby is playing the piano. Cathy is great too. She cares about Grandpa's health. She cooks delicious and healthy dishes for Grandpa.
Grandpa is very happy on his birthday. And we all have a great time together!
【知识点】
日记格式规范，英语记叙文写作，生日场景表达
【点评】
本题是结合图片与提示的英语写作题，重点考察学生对日记格式的掌握和英语叙事能力，要求学生能将提示中的中文要点转化为通顺连贯的英语短文，同时要注意要点齐全、时态统一，贴合生活场景进行表达，有助于提升学生运用英语记录生活的能力。
【难度系数】
0.7