答案：【解析】：这是一道英语阅读理解题，主要考查学生对文章细节的理解能力。对于第一个问题“What did Cindy and Grandma come to the park for?”，需要从文中找到Cindy和奶奶来公园的目的相关表述；对于第二个问题“How do you like the four seasons?”，需要结合文中对四季的描述以及Cindy对四季的看法来回答。
【答案】：
1. They came to the park for a walk and a picnic. （从文中“Cindy held her grandmother's hand as they walked through the park.”以及后面“Can we have our picnic now? I'd like to sit under the tree.”可推断出她们来公园散步并准备野餐。）
2. I like the four seasons because they are different and make everything unusual and beautiful. （结合文中Cindy对四季的看法“I like it when the seasons are different.”以及奶奶说的“That's what makes everything unusual and beautiful. Nothing is the same.”可得出此答案。）