三、根据汉语意思完成短文。
Bees are small but they matter a lot! They're very important to our 21. (行星). A single bee can carry pollen in its body. They play an important 22. (作用) in pollination. They fly from flower to flower every day to finish this important work. In fact, about 75 per cent of our food depends on them. 23. (没有) bees, fruits like apples wouldn't exist, and many plants would fail to produce seeds. Their honeycomb is also useful to 24. (人). We can get sweet 25. (蜂蜜) from it for daily use. Sadly, 26. (气候) change affects them. What's worse, some people fail to realize their 27. (重要性) and have done something terrible to them. Wild bees are becoming fewer around the world. Therefore, we must take action to 28. (保护) them! A 29. (生机勃勃的) and healthy ecosystem can be achieved only if all the creatures take 30. (行动). Every small effort makes a difference.

21. planet
22. role/part
23. Without
24. humans/people
25. honey
26. climate
27. importance
28. protect
29. lively
30. action

本题考查人教版八年级上册Unit4的核心词汇拼写与常用固定搭配，需结合语境、汉语提示和语法规则填写正确形式：
1. 第21空：形容词性物主代词our后接名词，“行星”对应单词planet，此处指代我们生存的星球，用单数即可；
2. 第22空：固定搭配play an important role/part in表示“在……中起重要作用”，对应汉语提示“作用”；
3. 第23空：此处作状语表“没有”，用介词Without，位于句首首字母需大写；
4. 第24空：此处泛指人类，对应表示“人”的复数名词humans/people都符合语境；
5. 第25空：“蜂蜜”对应不可数名词honey；
6. 第26空：固定表达climate change意为“气候变化”，对应汉语提示“气候”；
7. 第27空：形容词性物主代词their后接名词，“重要性”对应名词importance；
8. 第28空：不定式符号to后接动词原形，“保护”对应动词protect；
9. 第29空：修饰名词ecosystem需用形容词，“生机勃勃的”对应形容词lively；
10. 第30空：固定搭配take action意为“采取行动”，对应汉语提示“行动”。