Ⅳ. 语法填空。
Days ago, I read a science book about life on earth. It mentioned that plants and animals are closely (1) (connect) with each other. In fact, they are important in keeping the balance of (2) (we) ecosystems.
Take plants for example. Bamboo is a fast-growing plant. People use it to build bridges (3) make tools. More importantly, it's the main food for pandas. (4) (with) bamboo, pandas could die out.
Among animals, the cheetah is the (5) (fast) land animal. Its speed helps it hunt (6) (efficient). But the cheetah does (7) (much) than just hunt. It plays (8) part in changing the number of its prey (猎物). So it keeps the whole food chain balanced.
In order to protect this kind of balance, we (9) (human) must do our parts. We should create safe living places for animals and plants in danger. (10) we do so, we can keep the amazing variety of life alive for tomorrow.

1. connected 2. our 3. and 4. Without 5. fastest 6. efficiently 7. more 8. a 9. humans 10. If

【分析】
本题为英语语法填空题，需结合语境、语法规则及固定搭配完成填空。解题思路：先通读全文把握主旨（动植物相互关联，维持生态平衡），再逐个分析每个空：1. 考查被动语态固定搭配；2. 修饰名词需用形容词性物主代词；3. 并列动作需用并列连词；4. 结合语境逻辑填介词；5. 表范围用形容词最高级；6. 修饰动词用副词；7. 由than判断用比较级；8. 固定短语需填冠词；9. 主语“人类”用复数；10. 引导条件状语从句用连词。
【解析】
1. 固定搭配be connected with意为“与……相连”，此处为被动结构，故填connected；
2. 空格后为名词ecosystems，需用we的形容词性物主代词our修饰，意为“我们的生态系统”，故填our；
3. build bridges（建桥）和make tools（做工具）是并列动作，需用并列连词and连接，故填and；
4. 结合后文“熊猫会灭绝”的语境，此处表示“没有”竹子，填介词Without，故填Without；
5. 范围是所有陆地动物，需用fast的最高级fastest，意为“最快的”，故填fastest；
6. 空格处修饰动词hunt，需用efficient的副词形式efficiently，故填efficiently；
7. 由句中than可知，需用much的比较级more，故填more；
8. 固定短语play a part in意为“参与，起作用”，需填不定冠词a，故填a；
9. 主语表示“我们人类”，human的复数形式为humans，故填humans；
10. 空格处引导条件状语从句，意为“如果”，填连词If，故填If。
【答案】
1. connected 2. our 3. and 4. Without 5. fastest 6. efficiently 7. more 8. a 9. humans 10. If
【知识点】
被动语态、形容词性物主代词、副词用法
【点评】
本题围绕生态保护主题，考查初中英语核心语法点，涵盖被动语态、词性转换、比较级最高级、固定搭配等，需学生结合语境与语法规则作答，题型常规，难度适中。
【难度系数】
0.6

Ⅴ. 综合填空。

Butterflies work very hard. Their greatest work is pollination. They fly from one flower (1) another, carrying pollen. This helps fruits, (2) and other plants grow. Without butterflies, about 80% of plants cannot grow. (3) , many scientists say butterflies are one of the most important animals on earth.
Butterflies are also (4) animals in the world. They often stay (5) in groups. (6) a butterfly finds food, it may move its wings or use smells to tell others where it is.
However, the number of butterflies is (7) , and this is dangerous. They need our (8) , and there is a lot we can do. Plant flowers that butterflies like. Don't use pesticides（农药）that hurt them. Also, telling others about the (9) of butterflies can encourage more people to join in the protection efforts. Let's work together (10) butterflies!

1. to 2. vegetables 3. For this reason 4. the most interesting 5. together 6. When 7. dropping 8. help 9. importance 10. to save

【分析】
本题为英语综合填空题，需结合语境、固定搭配、语法规则，从给定词汇中选择合适的词填空。解题时先分析每个空的词性要求、上下文逻辑，再匹配对应词汇：1. 固定搭配from...to...；2. 与fruits并列需名词复数；3. 表结果的逻辑短语；4. 修饰名词的最高级短语；5. 固定短语stay together；6. 引导时间状语从句的连词；7. 表数量变化的现在分词；8. 名词“帮助”；9. 名词“重要性”；10. 固定搭配work together to do sth。
【解析】
1. 固定搭配“from...to...”表示“从……到……”，故填to；
2. 空格与fruits并列，需用名词复数，vegetable的复数为vegetables，符合语境；
3. 前文说明蝴蝶对植物的重要性，此处表结果，For this reason（因此）符合逻辑；
4. 结合语境“蝴蝶是世界上最有趣的动物”，the most interesting（最有趣的）符合；
5. stay together是固定短语，意为“待在一起”，故填together；
6. 此处引导时间状语从句，When（当……时）符合；
7. 表示蝴蝶数量正在下降，用现在分词dropping构成现在进行时；
8. 句意为“它们需要我们的帮助”，help（帮助）符合；
9. the importance of...表示“……的重要性”，故填importance；
10. work together to do sth是固定用法，意为“一起做某事”，故填to save。
【答案】
1. to 2. vegetables 3. For this reason 4. the most interesting 5. together 6. When 7. dropping 8. help 9. importance 10. to save
【知识点】
英语固定搭配、英语名词复数、英语词汇运用
【点评】
本题考查英语综合填空，侧重基础词汇的词义、词性及固定搭配的运用，需结合上下文逻辑判断，难度适中，适合中等水平学生练习。
【难度系数】
0.5