A. 根据语境填写单词。
1. At the Mid-Autumn Festival, Chinese families usually eat while watching the full moon.
2. My little cousin gained five during the summer vacation because he ate too much.
3. We need to out the fruits and desserts before the guests arrive.
4. If the thief others' things, he must be punished by the law.
5. I think making Chinese dumplings is interesting!

1. mooncakes
2. pounds
3. lay
4. steals
5. that

1. 根据中秋节的传统习俗，中国人赏月时通常食用月饼，mooncake为可数名词，此处用复数形式表示泛指这类食物。
2. 根据“吃太多体重增长”的语境，此处表示增重五磅，pound是可数名词，前面有数词five修饰，需要使用复数形式。
3. 固定短语lay out意为“摆放、布置”，符合“客人抵达前摆好水果和甜点”的语境，且need to后接动词原形。
4. 句子是if引导的条件状语从句，遵循“主将从现”规则，主语the thief是第三人称单数，谓语动词用第三人称单数形式，steal意为“偷窃”，符合“小偷偷他人财物会受到法律惩处”的语境。
5. 此处用that引导宾语从句，从句中动名词短语making Chinese dumplings作主语，that仅起连接作用，不充当从句成分，符合句子结构和语义。

B. 请选择一个你最喜欢的中国传统节日,查找它的相关资料并补全表格。
When is it celebrated? It is celebrated on 1. .
What kind of festival is it? It is a 2. festival(e. g. family, harvest, memorial).
What do people do during the festival? 3.
What special food do people eat? 4.
Why do you like this festival? (no more than 10 words) Because 5. .

1. the 15th day of the 8th lunar month
2. family
3. People get together with family, watch the full moon and share stories.
4. People eat different kinds of delicious mooncakes.
5. I can stay with all my family

本题为开放性题目，我们选取中国传统节日中秋节作为作答示例，所用词汇均符合八年级英语知识范围，满足题目各项要求：1. 填写中秋节的庆祝日期；2. 填写节日的属性，中秋节是阖家团圆的家庭类节日；3. 填写节日期间人们的常见活动；4. 填写节日对应的特色食物；5. 按照要求用不超过10个单词说明喜欢该节日的原因。