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C. Choose the best answer and complete the passage（选择最恰当的选项完成短文）
The Science of Night Hiking
During a nature camp, the instructor asked all the students to join a night hike in the forest. As the sun set, they switched off their flashlights and walked carefully along the trail. Then the instructor said, “Tonight, your challenge is to navigate safely without using your eyes.”
To guide the students, the instructor made a sharp whistle sound. The sound travelled through the trees, bounced off rocks and branches, and returned as echoes. By listening carefully, people could tell 1 obstacles were in front of them, even without seeing anything. This ability is called echolocation. Scientists have found that with enough practice, blind people can use this skill to move safely and even enjoy sports that were once thought to be 2 for them.
As they moved slowly along the dark path, the instructor explained that researchers once believed echolocation could only be learned by blind people. After losing sight, a person’s brain adapts and starts to work 3, allowing them to process sound in ways sighted people usually do not. Scientists thought this brain change was crucial for developing echolocation.
“But research continues to surprise us,” the instructor added. A recent experiment showed that both blind and sighted participants joined a 10-week training programme to make clicking sounds and move in dark spaces. At first, everyone bumped into obstacles, but with practice, they improved. By the end, both groups could navigate the forest confidently.
So what’s the 4 behind this fascinating result? Brain scans revealed that the visual cortex — the part of the brain that helps us see — was also active when participants listened to sounds. This shows that the visual cortex does more than see — it also 5 information from other senses, such as hearing and touch.
When the hike finished, the students cheered. Smiling, the instructor said, “This challenge wasn’t just about moving in the dark. It’s about discovering how 6 the human brain can be. Even when one sense is limited, the brain finds new ways to help us understand the world.”
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The Science of Night Hiking
During a nature camp, the instructor asked all the students to join a night hike in the forest. As the sun set, they switched off their flashlights and walked carefully along the trail. Then the instructor said, “Tonight, your challenge is to navigate safely without using your eyes.”
To guide the students, the instructor made a sharp whistle sound. The sound travelled through the trees, bounced off rocks and branches, and returned as echoes. By listening carefully, people could tell 1 obstacles were in front of them, even without seeing anything. This ability is called echolocation. Scientists have found that with enough practice, blind people can use this skill to move safely and even enjoy sports that were once thought to be 2 for them.
As they moved slowly along the dark path, the instructor explained that researchers once believed echolocation could only be learned by blind people. After losing sight, a person’s brain adapts and starts to work 3, allowing them to process sound in ways sighted people usually do not. Scientists thought this brain change was crucial for developing echolocation.
“But research continues to surprise us,” the instructor added. A recent experiment showed that both blind and sighted participants joined a 10-week training programme to make clicking sounds and move in dark spaces. At first, everyone bumped into obstacles, but with practice, they improved. By the end, both groups could navigate the forest confidently.
So what’s the 4 behind this fascinating result? Brain scans revealed that the visual cortex — the part of the brain that helps us see — was also active when participants listened to sounds. This shows that the visual cortex does more than see — it also 5 information from other senses, such as hearing and touch.
When the hike finished, the students cheered. Smiling, the instructor said, “This challenge wasn’t just about moving in the dark. It’s about discovering how 6 the human brain can be. Even when one sense is limited, the brain finds new ways to help us understand the world.”
(
B
) 1. A. how B. whether C. when D. why(
D
) 2. A. useless B. funny C. boring D. impossible(
C
) 3. A. slowly B. truly C. differently D. regularly(
B
) 4. A. problem B. reason C. advantage D. purpose(
A
) 5. A. deals with B. stands for C. consists of D. gives up(
D
) 6. A. rare B. forgetful C. usual D. powerful答案
1. B 2. D 3. C 4. B 5. A 6. D
解析
【分析】
本题为完形填空，需结合上下文语境、词汇词义辨析逐一分析每个空：
1. 第1空：前文提到声音反弹形成回声，通过听回声能判断是否有障碍物，需选表“是否”的词，结合选项分析。
2. 第2空：结合语境，以前认为盲人无法做某些运动，需选表“不可能”的词，匹配上下文逻辑。
3. 第3空：大脑在失明后会适应，工作方式与常人不同，需选表“不同地”的副词，符合大脑适应的特点。
4. 第4空：后文解释了实验结果的原因，此处问结果背后的核心因素，需选对应名词。
5. 第5空：视觉皮层除处理视觉外，还处理其他感官信息，需选表“处理”的动词短语，匹配功能描述。
6. 第6空：文章强调大脑在某一感官受限后仍能发挥作用，体现大脑的特性，需选对应形容词。
【解析】
1. 第1空：根据语境，回声可帮助判断“是否”有障碍物，选项中whether（是否）符合，故选B。
2. 第2空：结合上下文，以前认为盲人无法做某些运动，impossible（不可能的）符合语境，故选D。
3. 第3空：大脑适应失明后，工作方式“不同”于常人，differently（不同地）符合，故选C。
4. 第4空：后文解释实验结果的原因，此处问“原因”，reason（原因）符合，故选B。
5. 第5空：视觉皮层“处理”其他感官信息，deals with（处理）符合，故选A。
6. 第6空：文章强调大脑的“强大”，powerful（强大的）符合，故选D。
【答案】
1. B 2. D 3. C 4. B 5. A 6. D
【知识点】
完形填空、词汇辨析、上下文语境理解
【点评】
本题为完形填空题型，考查学生对文章语境的理解能力及常用词汇、短语的辨析运用能力，需结合上下文逻辑和词义逐一判断，难度适中。
【难度系数】
0.5
本题为完形填空，需结合上下文语境、词汇词义辨析逐一分析每个空：
1. 第1空：前文提到声音反弹形成回声，通过听回声能判断是否有障碍物，需选表“是否”的词，结合选项分析。
2. 第2空：结合语境，以前认为盲人无法做某些运动，需选表“不可能”的词，匹配上下文逻辑。
3. 第3空：大脑在失明后会适应，工作方式与常人不同，需选表“不同地”的副词，符合大脑适应的特点。
4. 第4空：后文解释了实验结果的原因，此处问结果背后的核心因素，需选对应名词。
5. 第5空：视觉皮层除处理视觉外，还处理其他感官信息，需选表“处理”的动词短语，匹配功能描述。
6. 第6空：文章强调大脑在某一感官受限后仍能发挥作用，体现大脑的特性，需选对应形容词。
【解析】
1. 第1空：根据语境，回声可帮助判断“是否”有障碍物，选项中whether（是否）符合，故选B。
2. 第2空：结合上下文，以前认为盲人无法做某些运动，impossible（不可能的）符合语境，故选D。
3. 第3空：大脑适应失明后，工作方式“不同”于常人，differently（不同地）符合，故选C。
4. 第4空：后文解释实验结果的原因，此处问“原因”，reason（原因）符合，故选B。
5. 第5空：视觉皮层“处理”其他感官信息，deals with（处理）符合，故选A。
6. 第6空：文章强调大脑的“强大”，powerful（强大的）符合，故选D。
【答案】
1. B 2. D 3. C 4. B 5. A 6. D
【知识点】
完形填空、词汇辨析、上下文语境理解
【点评】
本题为完形填空题型，考查学生对文章语境的理解能力及常用词汇、短语的辨析运用能力，需结合上下文逻辑和词义逐一判断，难度适中。
【难度系数】
0.5
