一、活动开始前，新成员 Cindy 和 Betty 谈论起树木对人类的重要性。通读下面对话，从方框内的选项中选出最佳选项填入空白处，选项中有一项为多余选项。
A. They help us in many ways.
B. We should take action to protect them now!
C. Fruit and plant oil are from trees.
D. They are very important to humans.
E. So they are fighters against air pollution.
F. Trees can grow well with enough water and sunlight.
Cindy: Do you know how trees help us?
Betty: 1. For example, they keep the air clean. They take in harmful gases and produce O₂ for us to breathe.
Cindy: 2.
Betty: Exactly. They also make our lives more convenient. Many daily things are made of trees, like chopsticks and pencils.
Cindy: In fact, we get a lot more than these. 3. Tea comes from the leaves of trees.
Betty: I can't imagine a world without trees.
Cindy: Neither can I. 4. But millions of trees are cut down every year.
Betty: 5.

1. A 2. E 3. C 4. D 5. B

我们结合对话上下文逻辑逐一匹配选项：
1. 第一空：问句询问树木如何帮助人类，后文紧接着列举树木净化空气的具体作用，此处需要总起说明树木在多方面给人类提供帮助，对应A选项。
2. 第二空：上文刚提到树木吸收有害气体、产出氧气净化空气的内容，此处承接该内容得出树木是对抗空气污染的斗士的结论，和后文Betty的赞同回应完全匹配，对应E选项。
3. 第三空：前文表示人类从树木处获得的好处远不止之前提到的内容，后文举例茶叶来自树叶，此处同样列举树木给人类提供的产物，符合语境，对应C选项。
4. 第四空：前文表达无法想象没有树木的世界，后文转折指出每年有大量树木被砍伐，此处强调树木对人类的重要性，起到承上启下的作用，对应D选项。
5. 第五空：前文提到大量树木被砍伐的现状，此处收尾发出保护树木的行动呼吁，符合对话逻辑，对应B选项。
多余选项F介绍树木的生长条件，和本次对话讨论树木对人类重要性的主题无关。

二、活动开始了，Amy 向大家分享了她帮助朋友的经历。请从方框内选择适当的词，并根据需要用其正确形式填空。注意：每空一词，每词仅用一次，有两词为多余项。
difference pass warmth if that illness
disappointed treat me to tell wisdom
Last month, my classmate Lily was absent from school for a week. We all wondered why she didn't come. Later, we 1. that she had an 2. and needed 3. at home.
One afternoon, I decided to visit her with some notes. When I arrived at her home, she looked a little sad. She said she was 4. because she had missed many lessons. "Excuse 5. , could you please help me with my maths?" she asked politely. I nodded and spent two hours explaining the key points to her. I told her 6. she could ask me any questions whenever she wanted. During the visit, Lily's mum prepared some snacks for us, and the 7. from them made me feel happy.
A few days later, Lily returned 8. school. With my help, she caught up with the class quickly. She said I was a lucky star for her. We all know that a small help can make a big 9. . Problems can always be solved with kindness, and love 10. on if we are willing to help others.

1. told
2. illness
3. treating
4. disappointed
5. me
6. that
7. warmth
8. to
9. difference
10. passes

逐空结合语境、时态、固定搭配分析如下：
1. 全文叙述过去发生的事，时态为一般过去时，此处表达“后来我们得知”，选用动词tell的过去式told。
2. 不定冠词an后接元音音素开头的名词，表达“生病”的含义，用名词illness，构成固定搭配have an illness。
3. 此处表达生病需要在家被照料，need doing是主动形式表被动含义，选用动词treat的动名词形式treating。
4. 此处作表语，主语是人，表达“感到失望”的含义，用形容词disappointed。
5. 此处是日常礼貌固定搭配Excuse me，意为“打扰一下”，填me。
6. 此处引导陈述含义的宾语从句，选用引导词that。
7. 定冠词the后接名词，表达“这份暖意”的含义，填名词warmth。
8. 此处是固定搭配return to school，意为“返回学校”，填介词to。
9. 此处是固定搭配make a big difference，意为“产生重大影响”，填difference。
10. 固定短语pass on意为“传递”，主语love是不可数名词，句子为一般现在时，谓语用第三人称单数passes，表达“爱会传递下去”的含义。
多余未使用的词汇为if和wisdom，符合题目要求。