阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。 In our community, I went downstairs to join in a “barter (以物易物)” event and found a box at the entrance of the hallway with the words “Barter Box” written on it. I remembered that some neighbors had shown off their rich box shops, so I wanted to see if there were any tomatoes I liked inside. However, I found only a few zucchinis (西葫芦) left in the box. Zucchinis are one of the supplies frequently given out in the community, and almost every household has some. I was surprised: Who would be so inconsiderate to take the items everyone wanted and leave these unwanted zucchinis The next day, I noticed that the zucchinis had been exchanged, and the box had turned into an amazing “grocery store”. After watching for some time, I found that in the morning, the box still contained the unwanted zucchinis, but by evening, they had all been exchanged for other essential items. This kind of exchange happened every day. One day, when I went downstairs, I happened to meet my neighbor, Mrs Shi. She skillfully took zucchinis from the box and put in a few bags of milk. I was even more puzzled, remembering that Mrs Shi had once quietly complained about not liking zucchinis when supplies were given out. Through the community’s group chat, I learned the following story. A week ago, Mrs Shi was about to go upstairs with her group purchase supplies when she was stopped by an elderly lady on the first floor. The old lady anxiously asked her how to buy fresh vegetables. Mrs Shi then realized that the old lady lived alone and might not know how to use a smartphone for group purchases. She wanted to give some vegetables to the old lady for free, but the old lady firmly refused. 注意： 1. 续写词数应为150个左右； 2. 请按如下格式在答题卡的相应位置作答。 第一段：Mrs Shi offered to sell her vegetables cheaply, but the old lady refused again. 第二段：The “grocery store” became a place where people could help the old lady. 文章大意： 作者在社区“以物易物”活动中，发现写有“Barter Box”的箱子里一开始只有西葫芦，对这种情况感到疑惑。之后发现西葫芦每天都能神奇地换成其他物品。偶遇邻居施太太从箱子拿西葫芦并放入牛奶，这一行为让作者更加困惑，因为作者记得施太太曾抱怨不喜欢西葫芦。通过社区群聊得知，一周前施太太被一楼独居老太太询问如何买菜，老太太不会用智能手机团购，施太太想免费送菜被拒。 伏笔及在续写中的回应： 伏笔：箱子里一开始只有西葫芦，让人疑惑谁这么做。回应：续写中揭示是施太太为帮助老太太设置的，用西葫芦作为交换起点，让老太太能接受帮助。 伏笔：施太太曾抱怨不喜欢西葫芦。回应：原来她拿西葫芦是为了帮助老太太，她的行为与之前抱怨形成反差，突出她的善良用心。 伏笔：西葫芦每天都能神奇地换成其他物品。回应：续写中表明是邻居们知晓情况后，配合施太太，用西葫芦和老太太交换，让老太太能获取所需物品。 伏笔：老太太不会用智能手机团购且拒绝免费送菜。回应：在续写中，大家通过以物易物的方式，既满足老太太需求，又维护了她的自尊。 伏笔：作者对以物易物箱子的情况持续关注。回应：在续写中作者参与其中，传递这份温暖，也见证邻里 ... ...
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