One possible version：

My Plans for May Day

Time flies! May Day holiday is coming soon. On May Day, first, I will visit Grandparents with my parents. Then we are going sightseeing. We will have a picnic in Taihu Park. After the picnic, we are going to a shop to buy clothes. Last, we are going to come home at half past four. In the evening, I will play games online。I will have a good time this day.

题目分析：这是一篇给材料作文，介绍自己五一节打算做3-4件事情。结合所给材料，可知本文主要考查一般将来时态，人称为第一人称，注意主谓一致问题，句子结构主要为系表结构，注意一些常见句式的应用，比如：I will visit……，we are going to……及I will have……等句式的应用。写作中注意运用代词，注意多种句式交替运用。写作中注意叙述顺序，符合逻辑关系，注意文后要表达自己将会玩得愉快。

【亮点说明】本文结构紧凑，语言简练。开头介绍了五一节将要到来，接下来介绍自己在这一天打算要做的事，最后表达自己将会玩得愉快。此处用了with my parents，going sightseeing，play games online，have a good time等这些词组的运用也让文章增色不少。