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训练1
体裁：说明文 主题：自然灾害 难度：★★★★ 建议用时：7 min 正确率： /5
Have you ever dreamed about what it would be like to go to some of the farthest places on Earth? Perhaps you'd like to cross the Sahara Desert. As you experience the heat, you might find yourself wishing for a light wind. However, if you notice that the light wind turns into a heavy wind, you have to be careful, 1 What do you know about sandstorms?
The main causes of sandstorms include sand-dust source(沙尘源), strong winds and air conditions that are likely to change suddenly. Sandstorms appear when strong winds blow lots of sand and dust into the air. 2 For example, sandstorms are quite common in the Sahara Desert.
Sandstorms can happen quickly and without much warning. 3 Therefore, it doesn't take hurricane-force(飓风级别)winds to get sand and dust moving through the air. The faster the wind blows, the higher and farther the sand and dust can be blown.
4 Since they can reduce visibility(能见度)to near zero, sandstorms make traveling difficult. Blowing sand and dust can also get into the machine, making it broken.
Sandstorms can also cause all kinds of health problems, since sand and dust flying through the air can find their way into your eyes, nose, mouth, and so on. During a sandstorm, you should wear masks if you are outside. 5
A. Sandstorms can be very dangerous.
B. because you're likely to be in a sandstorm.
C. because it is hard for you to find your way.
D. They usually happen in sandy areas, especially deserts.
E. In recent years, sandstorms haven't been common in China.
F. If you have a bad cough after a sandstorm, go to the hospital.
G. Wind speeds as low as 25 miles per hour can cause sandstorms.
1.
2.
3.
4.
5.
体裁：说明文 主题：自然灾害 难度：★★★★ 建议用时：7 min 正确率： /5
Have you ever dreamed about what it would be like to go to some of the farthest places on Earth? Perhaps you'd like to cross the Sahara Desert. As you experience the heat, you might find yourself wishing for a light wind. However, if you notice that the light wind turns into a heavy wind, you have to be careful, 1 What do you know about sandstorms?
The main causes of sandstorms include sand-dust source(沙尘源), strong winds and air conditions that are likely to change suddenly. Sandstorms appear when strong winds blow lots of sand and dust into the air. 2 For example, sandstorms are quite common in the Sahara Desert.
Sandstorms can happen quickly and without much warning. 3 Therefore, it doesn't take hurricane-force(飓风级别)winds to get sand and dust moving through the air. The faster the wind blows, the higher and farther the sand and dust can be blown.
4 Since they can reduce visibility(能见度)to near zero, sandstorms make traveling difficult. Blowing sand and dust can also get into the machine, making it broken.
Sandstorms can also cause all kinds of health problems, since sand and dust flying through the air can find their way into your eyes, nose, mouth, and so on. During a sandstorm, you should wear masks if you are outside. 5
A. Sandstorms can be very dangerous.
B. because you're likely to be in a sandstorm.
C. because it is hard for you to find your way.
D. They usually happen in sandy areas, especially deserts.
E. In recent years, sandstorms haven't been common in China.
F. If you have a bad cough after a sandstorm, go to the hospital.
G. Wind speeds as low as 25 miles per hour can cause sandstorms.
1.
B
2.
D
3.
G
4.
A
5.
F
答案
训练1【语篇解读】本文是一篇说明文。文章主要介绍了沙尘暴的主要成因、发生特点、危害和应对建议等。
1. B 根据上文“However, if you notice that the light wind turns into a heavy wind, you have to be careful”和下文“What do you know about sandstorms?”可知此处应解释小心的原因是可能会遭遇沙尘暴;B项“因为你可能会处于沙尘暴中”符合语境。故选B。
2. D 根据下文“For example, sandstorms are quite common in the Sahara Desert.”可知此处应介绍沙尘暴通常发生的地点;D项“它们通常发生在沙地,尤其是沙漠。”符合语境。故选D。
3. G 根据下文“Therefore, it doesn't take hurricane-force winds to get sand and dust moving through the air.”可知此处应介绍不需要飓风强度的风,较低风速就能引发沙尘暴;G项“风速低至每小时25英里的风,就可能引发沙尘暴。”符合语境。故选G。
4. A 根据下文“Since they can reduce visibility to near zero, sandstorms make traveling difficult.”可知此处应介绍沙尘暴会带来危险;A项“沙尘暴可能非常危险。”符合语境。故选A。
5. F 根据上文“Sandstorms can also cause all kinds of health problems... During a sandstorm, you should wear masks if you are outside.”可知此处应与沙尘暴后健康问题的建议有关;F项“如果你在沙尘暴后咳嗽严重,就去医院。”符合语境。故选F。
1. B 根据上文“However, if you notice that the light wind turns into a heavy wind, you have to be careful”和下文“What do you know about sandstorms?”可知此处应解释小心的原因是可能会遭遇沙尘暴;B项“因为你可能会处于沙尘暴中”符合语境。故选B。
2. D 根据下文“For example, sandstorms are quite common in the Sahara Desert.”可知此处应介绍沙尘暴通常发生的地点;D项“它们通常发生在沙地,尤其是沙漠。”符合语境。故选D。
3. G 根据下文“Therefore, it doesn't take hurricane-force winds to get sand and dust moving through the air.”可知此处应介绍不需要飓风强度的风,较低风速就能引发沙尘暴;G项“风速低至每小时25英里的风,就可能引发沙尘暴。”符合语境。故选G。
4. A 根据下文“Since they can reduce visibility to near zero, sandstorms make traveling difficult.”可知此处应介绍沙尘暴会带来危险;A项“沙尘暴可能非常危险。”符合语境。故选A。
5. F 根据上文“Sandstorms can also cause all kinds of health problems... During a sandstorm, you should wear masks if you are outside.”可知此处应与沙尘暴后健康问题的建议有关;F项“如果你在沙尘暴后咳嗽严重,就去医院。”符合语境。故选F。
解析
【分析】
本题为说明文七选五题型，需结合上下文的逻辑关系、语境内容匹配句子。解题思路：1. 第1空，上文提及微风变大需小心，下文引出沙尘暴话题，需说明小心的原因；2. 第2空，下文举例撒哈拉沙漠沙尘暴常见，需介绍沙尘暴的发生地点；3. 第3空，下文提到无需飓风级风即可起沙尘，需说明引发沙尘暴的风速条件；4. 第4空，下文讲沙尘暴降低能见度的危害，需总述沙尘暴的危险性；5. 第5空，上文讲沙尘暴的健康问题及应对，需补充沙尘暴后的健康建议。
【解析】
1. 上文“However, if you notice that the light wind turns into a heavy wind, you have to be careful”说明要小心，下文“What do you know about sandstorms?”引出沙尘暴话题，B项“because you're likely to be in a sandstorm”解释小心的原因，符合语境，故选B。
2. 下文“For example, sandstorms are quite common in the Sahara Desert”举例说明沙尘暴在沙漠常见，D项“They usually happen in sandy areas, especially deserts”介绍沙尘暴的发生地点，与例子呼应，故选D。
3. 下文“Therefore, it doesn't take hurricane-force winds to get sand and dust moving through the air”说明无需飓风级风即可引发沙尘暴，G项“Wind speeds as low as 25 miles per hour can cause sandstorms”说明低风速即可引发沙尘暴，与下文逻辑一致，故选G。
4. 下文“Since they can reduce visibility to near zero, sandstorms make traveling difficult”说明沙尘暴的危害，A项“Sandstorms can be very dangerous”总述沙尘暴的危险性，引出下文危害，故选A。
5. 上文“Sandstorms can also cause all kinds of health problems... During a sandstorm, you should wear masks if you are outside”讲沙尘暴的健康问题及应对，F项“If you have a bad cough after a sandstorm, go to the hospital”补充沙尘暴后的健康建议，符合语境，故选F。
【答案】
1.B 2.D 3.G 4.A 5.F
【知识点】
说明文阅读、七选五题型、语境逻辑推理
【点评】
本题围绕沙尘暴展开，考查学生对说明文上下文逻辑关系的理解与运用能力，需结合前后文内容匹配句子，是中等难度的阅读题型，能有效锻炼学生的语篇分析能力。
【难度系数】
0.4
本题为说明文七选五题型，需结合上下文的逻辑关系、语境内容匹配句子。解题思路：1. 第1空，上文提及微风变大需小心，下文引出沙尘暴话题，需说明小心的原因；2. 第2空，下文举例撒哈拉沙漠沙尘暴常见，需介绍沙尘暴的发生地点；3. 第3空，下文提到无需飓风级风即可起沙尘，需说明引发沙尘暴的风速条件；4. 第4空，下文讲沙尘暴降低能见度的危害，需总述沙尘暴的危险性；5. 第5空，上文讲沙尘暴的健康问题及应对，需补充沙尘暴后的健康建议。
【解析】
1. 上文“However, if you notice that the light wind turns into a heavy wind, you have to be careful”说明要小心，下文“What do you know about sandstorms?”引出沙尘暴话题，B项“because you're likely to be in a sandstorm”解释小心的原因，符合语境，故选B。
2. 下文“For example, sandstorms are quite common in the Sahara Desert”举例说明沙尘暴在沙漠常见，D项“They usually happen in sandy areas, especially deserts”介绍沙尘暴的发生地点，与例子呼应，故选D。
3. 下文“Therefore, it doesn't take hurricane-force winds to get sand and dust moving through the air”说明无需飓风级风即可引发沙尘暴，G项“Wind speeds as low as 25 miles per hour can cause sandstorms”说明低风速即可引发沙尘暴，与下文逻辑一致，故选G。
4. 下文“Since they can reduce visibility to near zero, sandstorms make traveling difficult”说明沙尘暴的危害，A项“Sandstorms can be very dangerous”总述沙尘暴的危险性，引出下文危害，故选A。
5. 上文“Sandstorms can also cause all kinds of health problems... During a sandstorm, you should wear masks if you are outside”讲沙尘暴的健康问题及应对，F项“If you have a bad cough after a sandstorm, go to the hospital”补充沙尘暴后的健康建议，符合语境，故选F。
【答案】
1.B 2.D 3.G 4.A 5.F
【知识点】
说明文阅读、七选五题型、语境逻辑推理
【点评】
本题围绕沙尘暴展开，考查学生对说明文上下文逻辑关系的理解与运用能力，需结合前后文内容匹配句子，是中等难度的阅读题型，能有效锻炼学生的语篇分析能力。
【难度系数】
0.4
