A. 根据语境及首字母提示，填写单词。
1. “E” means to examine or discuss something carefully in order to discover or understand it.
2. F is one of the light, flat growths that cover a bird's body, used for flying.
3. Scientists make efforts to u the secrets of nature.
4. W means lots of valuable things like money, property, or even knowledge.
5. The students are excited to see the chemicals r during the experiment.

1. Explore
2. Feather
3. unlock
4. Wealth
5. react

本题需结合给出的单词释义、句子语境和首字母提示，推断出符合语义的词汇：
1. 释义描述的是“为了发现、理解某事物，仔细检查或探讨它”的动作，结合首字母E，可推断对应单词为explore，意为“探索、探究”。
2. 释义描述的是覆盖在鸟类体表、用于飞行的轻质扁平结构，结合首字母F，可推断对应单词为feather，意为“羽毛”。
3. 句意为“科学家们努力揭开自然的奥秘”，结合首字母u，"unlock the secrets of nature"是常用固定表达，意为“揭开自然的秘密”，因此填unlock。
4. 释义描述的是金钱、财产甚至知识这类有价值的事物的统称，结合首字母W，可推断对应单词为wealth，意为“财富”。
5. 句意为“学生们很兴奋地看到实验过程中化学品发生反应”，结合首字母r，react意为“发生化学反应”，符合"see sth do"的结构要求，因此填react。

B. 请选择你喜欢的一种植物，查找资料并完成表格。
| What is the plant? | |
| Where does it grow? | |
| What does it look like? | |
| How does it help people? | |
| Why do you like it? (within 10 words) | |

1. What is the plant? 填写：It is a rose.
2. Where does it grow? 填写：It grows in warm, sunny places in many areas.
3. What does it look like? 填写：It has pretty colourful petals and small thorns on its stem.
4. How does it help people? 填写：People can make perfume or tea from it, and it is a popular nice gift.
5. Why do you like it? (within 10 words) 填写：It is beautiful and smells nice.

本题是开放性实践类英语习题，我们选取常见的玫瑰作为介绍对象，所用词汇均符合八年级英语的知识范围，内容简单准确，满足表格所有填写要求。