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一、完形填空
A team of Chinese scientists has found a new giant sinkhole(天坑). It's 192 metres 1. What did they find at the 2? An ancient(古老的) forest!
This 3 landscape was found in Leye County, in Guangxi Zhuang Autonomous Region. Leye County is famous 4 "the museum of sinkholes". People have 5 about 30 sinkholes there so far.
How do sinkholes form?
"China has a karst landscape," Veni told Live Science. Karst landscapes are made when rainwater runs through little cracks(裂缝) in the 6. The cracks 7 grow into tunnels(隧道) and then big caves(洞穴). Over time, a cave can get too 8. Its ceiling then falls slowly, opening up huge sinkholes.
Because of 9 great sizes, Veni called China's sinkholes "spectacular(壮观的)".
10 are sinkholes important?
Besides looking cool, karst caves and sinkholes can be 11 to all kinds of plants, animals and microbe life(微生物). The newly discovered one has ancient trees up to 40 metres tall. "I wouldn't be surprised to know that some species(物种) in these caves have never been 12 or described by science until now," said the leader of the exploration team, Chen Lixin. This is 13 the sinkholes are separate from the outside world. That 14 an environment for new species to form.
"Sinkholes also have deep stores of underground water. They are like nature's water pipes(管道). They bring 15 to 700 million people worldwide," Veni told Live Science.
(
B. deep
C. thin
D. long
(
B. top
C. bottom
D. start
(
B. amazing
C. early
D. careful
(
B. for
C. to
D. with
(
B. dug
C. reached
D. found
(
B. tree
C. ground
D. sky
(
B. easily
C. slowly
D. heavily
(
B. beautiful
C. flat
D. big
(
B. your
C. our
D. their
(
B. When
C. Where
D. What
(
B. home
C. land
D. house
(
B. sold
C. saved
D. left
(
B. but
C. if
D. after
(
B. gives
C. protects
D. helps
(
B. snow
C. water
D. food
A team of Chinese scientists has found a new giant sinkhole(天坑). It's 192 metres 1. What did they find at the 2? An ancient(古老的) forest!
This 3 landscape was found in Leye County, in Guangxi Zhuang Autonomous Region. Leye County is famous 4 "the museum of sinkholes". People have 5 about 30 sinkholes there so far.
How do sinkholes form?
"China has a karst landscape," Veni told Live Science. Karst landscapes are made when rainwater runs through little cracks(裂缝) in the 6. The cracks 7 grow into tunnels(隧道) and then big caves(洞穴). Over time, a cave can get too 8. Its ceiling then falls slowly, opening up huge sinkholes.
Because of 9 great sizes, Veni called China's sinkholes "spectacular(壮观的)".
10 are sinkholes important?
Besides looking cool, karst caves and sinkholes can be 11 to all kinds of plants, animals and microbe life(微生物). The newly discovered one has ancient trees up to 40 metres tall. "I wouldn't be surprised to know that some species(物种) in these caves have never been 12 or described by science until now," said the leader of the exploration team, Chen Lixin. This is 13 the sinkholes are separate from the outside world. That 14 an environment for new species to form.
"Sinkholes also have deep stores of underground water. They are like nature's water pipes(管道). They bring 15 to 700 million people worldwide," Veni told Live Science.
(
B
)1. A. tallB. deep
C. thin
D. long
(
C
)2. A. endB. top
C. bottom
D. start
(
B
)3. A. terribleB. amazing
C. early
D. careful
(
A
)4. A. asB. for
C. to
D. with
(
D
)5. A. madeB. dug
C. reached
D. found
(
C
)6. A. floorB. tree
C. ground
D. sky
(
C
)7. A. luckilyB. easily
C. slowly
D. heavily
(
D
)8. A. smallB. beautiful
C. flat
D. big
(
D
)9. A. hisB. your
C. our
D. their
(
A
)10. A. WhyB. When
C. Where
D. What
(
B
)11. A. schoolB. home
C. land
D. house
(
A
)12. A. knownB. sold
C. saved
D. left
(
A
)13. A. becauseB. but
C. if
D. after
(
B
)14. A. hurtsB. gives
C. protects
D. helps
(
C
)15. A. rainB. snow
C. water
D. food
答案
1~5 BCBAD 6~10 CCDDA
11~15 BAABC
【语篇解读】本文是一篇说明文。文章主要介绍了中国科学家发现巨大天坑，内有远古森林。天坑形成于喀斯特地貌，因雨水溶蚀岩石形成。天坑和溶洞可孕育独特物种和储存地下水。
11~15 BAABC
【语篇解读】本文是一篇说明文。文章主要介绍了中国科学家发现巨大天坑，内有远古森林。天坑形成于喀斯特地貌，因雨水溶蚀岩石形成。天坑和溶洞可孕育独特物种和储存地下水。
解析
【分析】
做完形填空需先通读全文把握主旨，再逐空结合上下文语境、词汇词义辨析、固定搭配等分析选项。本题围绕中国发现的巨大天坑展开，需结合天坑的特征、形成原因及重要性等内容，逐一判断每个空的最佳选项。
【解析】
1. 天坑的深度用“deep”，故选B；
2. 在天坑底部发现古老森林，“bottom”符合，故选C；
3. 天坑内的远古森林是令人惊叹的景观，“amazing”合适，故选B；
4. “be famous for”是固定搭配，意为“因……著名”，此处指乐业县因“天坑博物馆”著名，故选B；
5. 到目前为止已发现约30个天坑，“found”符合语境，故选D；
6. 雨水穿过地面的裂缝，“ground”指地面，故选C；
7. 裂缝慢慢发展成隧道，“slowly”体现过程，故选C；
8. 洞穴太大导致顶部塌陷，“big”符合，故选D；
9. 指代天坑的巨大尺寸，用形容词性物主代词“their”，故选D；
10. 后文讲天坑的重要性，此处提问“为什么”，故选A；
11. 天坑是动植物和微生物的家园，“home”符合，故选B；
12. 一些物种从未被科学所知，“known”符合，故选A；
13. 解释天坑能孕育新物种的原因，用“because”，故选A；
14. 天坑为新物种形成提供环境，“gives”符合，故选B；
15. 天坑储存地下水，为人们提供水，“water”符合，故选C。
【答案】
1~5 BCBAD；6~10 CCDDA；11~15 BAABC
【知识点】
词汇辨析、固定搭配、语篇理解
【点评】
本题为说明文类完形填空，围绕天坑的发现、形成及重要性展开，侧重考查学生对上下文语境的理解、词汇词义辨析及固定搭配的掌握，是常见的基础型完形填空题型。
【难度系数】
0.6
做完形填空需先通读全文把握主旨，再逐空结合上下文语境、词汇词义辨析、固定搭配等分析选项。本题围绕中国发现的巨大天坑展开，需结合天坑的特征、形成原因及重要性等内容，逐一判断每个空的最佳选项。
【解析】
1. 天坑的深度用“deep”，故选B；
2. 在天坑底部发现古老森林，“bottom”符合，故选C；
3. 天坑内的远古森林是令人惊叹的景观，“amazing”合适，故选B；
4. “be famous for”是固定搭配，意为“因……著名”，此处指乐业县因“天坑博物馆”著名，故选B；
5. 到目前为止已发现约30个天坑，“found”符合语境，故选D；
6. 雨水穿过地面的裂缝，“ground”指地面，故选C；
7. 裂缝慢慢发展成隧道，“slowly”体现过程，故选C；
8. 洞穴太大导致顶部塌陷，“big”符合，故选D；
9. 指代天坑的巨大尺寸，用形容词性物主代词“their”，故选D；
10. 后文讲天坑的重要性，此处提问“为什么”，故选A；
11. 天坑是动植物和微生物的家园，“home”符合，故选B；
12. 一些物种从未被科学所知，“known”符合，故选A；
13. 解释天坑能孕育新物种的原因，用“because”，故选A；
14. 天坑为新物种形成提供环境，“gives”符合，故选B；
15. 天坑储存地下水，为人们提供水，“water”符合，故选C。
【答案】
1~5 BCBAD；6~10 CCDDA；11~15 BAABC
【知识点】
词汇辨析、固定搭配、语篇理解
【点评】
本题为说明文类完形填空，围绕天坑的发现、形成及重要性展开，侧重考查学生对上下文语境的理解、词汇词义辨析及固定搭配的掌握，是常见的基础型完形填空题型。
【难度系数】
0.6
