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Ⅱ. Choose the best answer and complete the passage（选择最恰当的选项完成短文）
Walking along Amsterdam’s canals, you will spot an interesting innovation that reshapes the fight against plastic waste: the bubble barrier. For decades, small rivers feeding the city’s waterways 1 tons of discarded plastic toward the North Sea. Single-use bottles, wrappers and tiny microplastic fragments drifted freely, 2 sea turtles and seabirds at constant risk of being poisoned.
Traditional clean-up boats only collected visible waste after pollution spread, which was slow and costly. Local engineers spent seven years testing a low-energy system, 3 on a simple physical rule: rising bubbles push floating rubbish to one side. An underwater rubber tube releases steady airflow, forming a bubble wall that blocks plastic 4 letting fish pass safely.
Official data shows each barrier stops 86% of river plastic before it reaches the ocean. What makes the design far more 5 than old tools is its round-the-clock operation with little electricity. Unlike expensive mechanical nets, it barely needs daily repairs, 6 cuts the city’s long-term waste management costs greatly.
Many critics once claimed such small projects could not fix global plastic 7. Yet Amsterdam’s success has encouraged dozens of European coastal cities to copy the model. Some cities match bubble barriers with recycling stations, 8 collected plastic into raw materials for new products.
Experts warn technical inventions alone will never end plastic pollution. The fundamental solution lies in 9 single-use plastic production at source. Even so, the bubble barrier proves smart low-carbon tech can buy precious time 10 nations sign a binding global plastic treaty.
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Walking along Amsterdam’s canals, you will spot an interesting innovation that reshapes the fight against plastic waste: the bubble barrier. For decades, small rivers feeding the city’s waterways 1 tons of discarded plastic toward the North Sea. Single-use bottles, wrappers and tiny microplastic fragments drifted freely, 2 sea turtles and seabirds at constant risk of being poisoned.
Traditional clean-up boats only collected visible waste after pollution spread, which was slow and costly. Local engineers spent seven years testing a low-energy system, 3 on a simple physical rule: rising bubbles push floating rubbish to one side. An underwater rubber tube releases steady airflow, forming a bubble wall that blocks plastic 4 letting fish pass safely.
Official data shows each barrier stops 86% of river plastic before it reaches the ocean. What makes the design far more 5 than old tools is its round-the-clock operation with little electricity. Unlike expensive mechanical nets, it barely needs daily repairs, 6 cuts the city’s long-term waste management costs greatly.
Many critics once claimed such small projects could not fix global plastic 7. Yet Amsterdam’s success has encouraged dozens of European coastal cities to copy the model. Some cities match bubble barriers with recycling stations, 8 collected plastic into raw materials for new products.
Experts warn technical inventions alone will never end plastic pollution. The fundamental solution lies in 9 single-use plastic production at source. Even so, the bubble barrier proves smart low-carbon tech can buy precious time 10 nations sign a binding global plastic treaty.
(
C
) 1. A. pour B. will pour C. have poured D. are pouring(
B
) 2. A. put B. putting C. to put D. puts(
D
) 3. A. base B. to base C. basing D. based(
A
) 4. A. while B. without C. through D. beside(
B
) 5. A. effect B. effective C. effectively D. effectiveness(
C
) 6. A. what B. who C. which D. whose(
B
) 7. A. festivals B. crises C. activities D. usage(
C
) 8. A. turn B. turned C. turning D. to turning(
A
) 9. A. cutting down B. cutting off C. cutting up D. cutting out(
B
) 10. A. after B. until C. before D. since答案
1. C 2. B 3. D 4. A 5. B 6. C 7. B 8. C 9. A 10. B
解析
【分析】
本题为环保主题的完形填空，需结合语境逻辑、英语语法（时态、非谓语动词、定语从句等）及词义辨析逐一解题：先分析每个空所在句子的结构，判断所需语法成分，再结合上下文语义匹配选项，确保逻辑通顺、语法正确。
【解析】
1. 第1空：时间状语“for decades”（数十年）是现在完成时的标志，主语“small rivers”为复数，故用“have poured”，选C。
2. 第2空：前面谓语动词“drifted”已存在，此处用现在分词作自然结果状语，表“导致海龟和海鸟持续处于中毒风险中”，选B。
3. 第3空：固定搭配“be based on”（基于），此处用过去分词作后置定语修饰“system”，选D。
4. 第4空：“while”表对比，意为“而”，气泡屏障阻挡塑料的同时让鱼安全通过，符合逻辑，选A。
5. 第5空：“more”后需接形容词，“effective”（有效的）为形容词，符合“更有效”的比较级结构，选B。
6. 第6空：非限制性定语从句，指代前面整个句子，用关系代词“which”，选C。
7. 第7空：“plastic crises”（塑料危机）符合语境，指全球塑料污染的危机，选B。
8. 第8空：前面谓语动词“match”已存在，此处用现在分词作伴随状语，表“将收集的塑料转化为新产品原料”，选C。
9. 第9空：“cut down”意为“减少”，此处指从源头减少一次性塑料生产，符合语义，选A。
10. 第10空：“until”意为“直到”，气泡屏障争取时间直到国家签署全球塑料条约，符合逻辑，选B。
【答案】
1.C 2.B 3.D 4.A 5.B 6.C 7.B 8.C 9.A 10.B
【知识点】
现在完成时、非谓语动词、词义辨析
【点评】
本题围绕环保主题，综合考查英语语法与时态、非谓语、从句及词汇辨析，需结合语境与语法规则解题，难度适中。
【难度系数】
0.5
本题为环保主题的完形填空，需结合语境逻辑、英语语法（时态、非谓语动词、定语从句等）及词义辨析逐一解题：先分析每个空所在句子的结构，判断所需语法成分，再结合上下文语义匹配选项，确保逻辑通顺、语法正确。
【解析】
1. 第1空：时间状语“for decades”（数十年）是现在完成时的标志，主语“small rivers”为复数，故用“have poured”，选C。
2. 第2空：前面谓语动词“drifted”已存在，此处用现在分词作自然结果状语，表“导致海龟和海鸟持续处于中毒风险中”，选B。
3. 第3空：固定搭配“be based on”（基于），此处用过去分词作后置定语修饰“system”，选D。
4. 第4空：“while”表对比，意为“而”，气泡屏障阻挡塑料的同时让鱼安全通过，符合逻辑，选A。
5. 第5空：“more”后需接形容词，“effective”（有效的）为形容词，符合“更有效”的比较级结构，选B。
6. 第6空：非限制性定语从句，指代前面整个句子，用关系代词“which”，选C。
7. 第7空：“plastic crises”（塑料危机）符合语境，指全球塑料污染的危机，选B。
8. 第8空：前面谓语动词“match”已存在，此处用现在分词作伴随状语，表“将收集的塑料转化为新产品原料”，选C。
9. 第9空：“cut down”意为“减少”，此处指从源头减少一次性塑料生产，符合语义，选A。
10. 第10空：“until”意为“直到”，气泡屏障争取时间直到国家签署全球塑料条约，符合逻辑，选B。
【答案】
1.C 2.B 3.D 4.A 5.B 6.C 7.B 8.C 9.A 10.B
【知识点】
现在完成时、非谓语动词、词义辨析
【点评】
本题围绕环保主题，综合考查英语语法与时态、非谓语、从句及词汇辨析，需结合语境与语法规则解题，难度适中。
【难度系数】
0.5
