英语九年级上册（2024）Theme Reading第4课时精练

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unit5 Explring the Tpic-Theme Reading
课时4 仁爱科普版初中英语九年级上册 (pp.87-88)
一、学习目标
1. 能够阅读并理解关于中国北斗导航卫星系统（BDS）发展历程的文章，提取关键时间节点（1980s、1994、2003、2012、2020）和核心事件信息。
2. 能够运用一般过去时和被动语态（was put int use, was cmpleted 等）叙述科技发展的历史过程。
3. 能够掌握本课核心词汇（navigatin, satellite, system, depend n, develp, strategy, cmpete, glbal 等）并运用于阅读理解和书面表达。
4. 能够运用"beginning-middle-end"图表梳理文章结构，按过去—现在—未来的时间线索复述课文内容。
二、重点
• 核心词汇：navigatin, satellite, system, depend n, develp, research and develpment, experiment, slve, technlgical, strategy, experienced, engineer, cmpete, glbal, ancient, cntinue, imprve, guide
• 核心结构：一般过去时（叙述历史事件）；被动语态（was put int use, was cmpleted, was named）
• 阅读策略：retelling（复述）past / present / future；beginning-middle-end chart（起因—经过—结果图表）
• 口语表达：能按时间顺序简述BDS的发展历程及其意义
三、难点
• 被动语态的准确使用（was put int use, was cmpleted, was named after 等），区分主动与被动
• 含定语从句的长句阅读理解（如 the seven bright stars that ancient Chinese used t find their ways）
• 运用时间线索和关键词复述BDS发展历程，做到信息完整、逻辑清晰
字词与词汇
语法与句型
1. 一般过去时——叙述历史事件
【规则】叙述过去发生的事件时，使用一般过去时。常见时间标志：in the early 1980s, in 1994, in 2003 等。
2. 被动语态——强调动作的承受者
【规则】当强调动作的承受者而非执行者时，使用被动语态（be + 过去分词）。叙述过去事件时用 was/were + 过去分词。
3. 易错纠错
学习支架
BDS发展时间线（Beginning-Middle-End）
四、知识要点
1. depend n 依赖；取决于
【概念】depend n 表示"依赖、依靠"，后接名词、代词或动名词；也可表示"取决于"。
【教材依据】In the early 1980s, the wrld depended n America's GPS fr navigatin.（教材 p.87）
【应用】We depend n satellites fr weather frecasts. / Success depends n hard wrk.
2. 被动语态（一般过去时）
【概念】主语是动作的承受者时用被动语态。结构：was/were + 过去分词。常用于叙述科技成果或历史事件。
【教材依据】BDS-1 was put int use in 2003. / BDS-2 was cmpleted in 2012.（教材 p.87）
【应用】The bridge was built in 2010. / The new technlgy was develped by Chinese scientists.
3. cntinue t d sth. 继续做某事
【概念】cntinue t d sth. 表示"继续做某事"，强调动作的延续。也可用 cntinue ding sth.，含义相近。
【教材依据】China will cntinue t imprve BDS and guide the whle wrld.（教材 p.88）
【应用】The scientists cntinued t d experiments. / We will cntinue t wrk n this prject.
4. aim t d sth. 旨在做某事
【概念】aim t d sth. 表示"旨在做某事、以……为目标"，常用于描述计划或目标。
【教材依据】The Chinese scientists aimed t make BDS wrk well at a glbal level.（教材 p.87）
【应用】The team aims t finish the prject by next year. / She aims t becme an engineer.
五、典型例题
【例1】In 2003, BDS-1 ________ and began prviding services fr peple in China.
A. put int use B. was put int use C. is put int use D. puts int use
【解答】B
【点拨】主语 BDS-1 是动作"投入使用"的承受者，且时间是 2003 年（过去），需用一般过去时的被动语态 was/were + 过去分词。BDS-1 是单数，用 was put int use。
【例2】The wrld ________ n America's GPS fr navigatin in the early 1980s.
A. depend B. depends C. depended D. depending
【解答】C
【点拨】时间状语 in the early 1980s 表示过去，谓语动词用一般过去时 depended。depend n 为固定搭配，意为"依赖"。
【例3】China's navigatin satellite system is named "Beidu" because it is the name fr the seven bright stars ________ ancient Chinese used t find their ways.
A. wh B. which C. that D. what
【解答】C
【点拨】先行词 the seven bright stars 指"物"，定语从句中用作宾语。that 和 which 都可指物，但此处先行词前有 the nly/序数词等修饰时优先用 that。此处 that 最为合适，指代 stars 并在从句中作宾语。
第二部分：同步练习
★ 基础巩固
一、单项选择
1. In the early 1980s, the wrld ________ n America's GPS fr navigatin.
A. depend B. depends C. depended D. depending
【答案】C
【解析】时间状语 in the early 1980s 表示过去，谓语用一般过去时 depended。depend n 为固定搭配。
2. In 2003, BDS-1 ________ and began prviding services fr peple in China.
A. put int use B. was put int use C. is put int use D. puts int use
【答案】B
【解析】BDS-1 是动作承受者，时间为过去，需用一般过去时被动语态 was put int use。
3. China's navigatin satellite system is ________ "Beidu" because f the seven bright stars.
A. name B. naming C. named D. t name
【答案】C
【解析】is named 表示"被命名为"，是被动语态。主语 system 是动作承受者。
4. Experienced engineers wrked clsely with yunger nes, ________ n successful experience.
A. pass B. passed C. passing D. t passing
【答案】C
【解析】passing n 作伴随状语，表示"传递"。用现在分词表示与主句动词同时发生的动作。
5. T ________ against Eurpe and America, the Chinese team wrked harder than ever.
A. cmplete B. cmpete C. cntinue D. develp
【答案】B
【解析】cmpete against 表示"与……竞争"，符合语境。cmplete 意为"完成"，cntinue 意为"继续"，develp 意为"发展"，均不符合。
二、首字母填空
6. China's Beidu N________ Satellite System (BDS) is ne f the best in the wrld.
【答案】Navigatin
【解析】Beidu Navigatin Satellite System 意为"北斗导航卫星系统"，navigatin 意为"导航"。
7. In 2012, BDS-2 was cmpleted. Its services c________ the Asia-Pacific area.
【答案】cvered
【解析】cver 意为"覆盖"，句意为"它的服务覆盖了亚太地区"。时间为过去，用过去式 cvered。
8. Ancient Chinese used the seven bright stars t g________ them t g in the right directin.
【答案】guide
【解析】guide 意为"引导、指引"。t guide them 表示"引导他们"，用动词原形。
三、句子改写
9. China decided t develp its wn system in 1994.（改为被动语态，以 its wn system 为主语）
【答案】Its wn system was decided t be develped by China in 1994.
【解析】改为被动语态：宾语 its wn system 变为主语，动词变为 was decided t be develped，添加 by China。注意：decide t d sth. 的被动结构为 be decided t be dne。
10. BDS-3 was cmpleted in 2020.（对画线部分 in 2020 提问）
【答案】When was BDS-3 cmpleted?
【解析】对时间状语 in 2020 提问用 When。被动语态的疑问句结构：Was/Were + 主语 + 过去分词？
★★ 能力提升
一、单项选择
1. The research and develpment team wrked day and night, ________ experiments and running tests.
A. d B. did C. ding D. t d
【答案】C
【解析】ding experiments 与 running tests 并列，作伴随状语，用现在分词形式。
2. ________ the effrts f many scientists, BDS-3 began prviding services arund the wrld in 2020.
A. Because B. Thanks t C. In rder t D. Instead f
【答案】B
【解析】Thanks t 意为"多亏了、由于"，后接名词短语，符合语境。Because 后接从句，In rder t 后接动词，Instead f 意为"而不是"。
3. The Chinese scientists aimed t make BDS wrk well at a ________ level.
A. glbe B. glbally C. glbal D. glbing
【答案】C
【解析】修饰名词 level 需用形容词 glbal（全球的）。glbe 是名词，glbally 是副词。
4. China will cntinue ________ BDS and guide the whle wrld t g in the right directin.
A. imprve B. t imprve C. imprving D. imprved
【答案】B
【解析】cntinue t d sth. 意为"继续做某事"。课文原文用 cntinue t imprve，表示未来将继续改进BDS。
二、阅读理解
Have yu ever used a navigatin app n yur phne? There is a gd chance that it uses China's Beidu Navigatin Satellite System (BDS). Tday, BDS is ne f the fur glbal navigatin satellite systems in the wrld, alng with America's GPS, Russia's GLONASS, and Eurpe's Galile.
The stry f BDS began in 1994 when China decided t build its wn navigatin system. Befre that, China had t depend n America's GPS. Hwever, depending n anther cuntry's system was nt safe. S Chinese scientists started t wrk n BDS.
It was nt an easy jurney. The team faced many technlgical prblems. They did cuntless experiments and tests. In 2003, BDS-1 was put int use. Nine years later, in 2012, BDS-2 was cmpleted and cvered the Asia-Pacific area. Finally, in 2020, BDS-3 was cmpleted and began serving the whle wrld.
The name "Beidu" cmes frm seven bright stars in the sky. Ancient Chinese sailrs used these stars t find their way at sea. Tday, BDS guides nt nly ships but als planes, cars, and even farmers' tractrs. In the future, China will cntinue t imprve BDS s that it can serve mre peple arund the wrld.
1. Hw many glbal navigatin satellite systems are there in the wrld accrding t the passage?
A. Tw. B. Three. C. Fur. D. Five.
【答案】C
【解析】第一段提到 BDS is ne f the fur glbal navigatin satellite systems，并列出了四个系统：BDS、GPS、GLONASS、Galile，共四个。
2. Why did China decide t build its wn navigatin system?
A. Because America's GPS was t expensive. B. Because depending n anther cuntry's system was nt safe. C. Because China wanted t cmpete in space. D. Because GPS did nt wrk in China.
【答案】B
【解析】第二段明确指出 depending n anther cuntry's system was nt safe，所以中国决定建立自己的导航系统。
3. When did BDS-2 begin t cver the Asia-Pacific area?
A. In 2003. B. In 2012. C. In 2015. D. In 2020.
【答案】B
【解析】第三段提到 In 2012, BDS-2 was cmpleted and cvered the Asia-Pacific area，BDS-2 在2012年覆盖亚太地区。
4. What can we learn frm the last paragraph?
A. BDS is nly used by ships. B. The name "Beidu" cmes frm a persn's name. C. BDS guides ships, planes, cars, and tractrs. D. China will stp imprving BDS in the future.
【答案】C
【解析】最后一段提到 BDS guides nt nly ships but als planes, cars, and even farmers' tractrs，说明BDS不仅用于船只，还用于飞机、汽车和拖拉机。选项C正确。
三、选词填空（每词限用一次）
depend decide experiment technlgy put strategy cver serve
China's Beidu Navigatin Satellite System (BDS) is ne f the best navigatin systems in the wrld. In the early 1980s, the wrld 1.________ n America's GPS. Hwever, in 1994, China 2.________ t develp its wn system.
A research and develpment team wrked day and night. They did 3.________ and slved many 4.________ prblems. In 2003, BDS-1 5.________ int use. This was the first step in China's three-step BDS 6.________.
In 2012, BDS-2 was cmpleted. Its services 7.________ the Asia-Pacific area. In 2020, BDS-3 was cmpleted and began prviding 8.________ arund the wrld. China will cntinue t imprve BDS in the future.
9. 第1空 ______
【答案】depended
【解析】句意为"世界依赖美国GPS"，时间为1980年代（过去），用过去式 depended。depend n 依赖。
10. 第2空 ______
【答案】decided
【解析】句意为"中国决定开发自己的系统"，decide t d sth. 决定做某事，过去时用 decided。
11. 第3空 ______
【答案】experiments
【解析】句意为"他们做实验"，d experiments 做实验，用复数形式。
12. 第4空 ______
【答案】technlgical
【解析】修饰名词 prblems 需用形容词 technlgical（技术的）。
13. 第5空 ______
【答案】was put
【解析】句意为"BDS-1被投入使用"，被动语态 was put int use。
14. 第6空 ______
【答案】strategy
【解析】three-step BDS strategy 意为"三步走BDS战略"，strategy 策略。
15. 第7空 ______
【答案】cvered
【解析】句意为"它的服务覆盖了亚太地区"，时间为过去，用过去式 cvered。
16. 第8空 ______
【答案】services
【解析】prviding services 意为"提供服务"，用名词复数 services。
四、书面表达
假设你校英语社团正在举办"中国科技成就"主题征文活动，请你根据以下提示写一篇短文介绍中国北斗导航卫星系统（BDS）。
提示：
1. BDS是什么？它的重要性如何？
2. BDS的发展历程（至少包含三个关键时间节点）；
3. BDS的命名来源及其未来展望。
要求：80词左右，可适当发挥；至少使用一次被动语态。
【参考范文】
China's Beidu Navigatin Satellite System (BDS) is ne f the fur glbal navigatin satellite systems in the wrld. It is very imprtant because it helps us navigate safely.
The develpment f BDS was nt easy. In 1994, China decided t develp its wn system. In 2003, BDS-1 was put int use. In 2012, BDS-2 was cmpleted and cvered the Asia-Pacific area. Finally, in 2020, BDS-3 was cmpleted and began serving the whle wrld.
The name "Beidu" cmes frm seven bright stars that ancient Chinese used t find their ways. In the future, China will cntinue t imprve BDS and guide the whle wrld.
【评分要点】
• 内容要点（8分）：①BDS是什么及其重要性（2分）；②至少三个关键时间节点（4分）；③命名来源及未来展望（2分）。
• 语言质量（6分）：语法正确、词汇丰富、至少使用一次被动语态（如 was put int use / was cmpleted）。
• 结构与连贯（4分）：条理清晰，使用时间线索连接各要点，过渡自然。
• 词数与书写（2分）：80词左右，书写工整。
★★★ 拓展延伸
1. Which f the fllwing sentences uses the passive vice crrectly?
A. BDS-3 cmpleted in 2020. B. BDS-3 was cmpleted in 2020. C. BDS-3 is cmpleting in 2020. D. BDS-3 cmpletes in 2020.
【答案】B
【解析】BDS-3 是动作"完成"的承受者，需用被动语态 was cmpleted。选项A缺少助动词 was；选项C和D均非被动结构。
2. What is the main purpse f using a beginning-middle-end chart when reading this text?
A. T learn new vcabulary. B. T understand the structure and retell the stry. C. T practice grammar rules. D. T translate the text int Chinese.
【答案】B
【解析】beginning-middle-end 图表用于梳理文章结构（起因—经过—结果），帮助理解和复述课文内容，而非单纯学习词汇或语法。
3. Think abut anther Chinese technlgical achievement (e.g., China High-Speed Rail, Tiangng Space Statin, FAST). Write 3-4 sentences abut it, using at least ne passive vice structure.（不少于40词）
【答案】参考答案：China High-Speed Rail is ne f the greatest technlgical achievements in China. It was develped t make travel faster and mre cnvenient. Tday, the high-speed rail netwrk cnnects many cities acrss the cuntry. In the future, China will cntinue t imprve it and help mre peple travel easily.
【解析】评分要点：①写出另一项中国科技成就的名称（1分）；②至少使用一次被动语态（2分）；③内容通顺、语法正确（1分）；④词数不少于40词（1分）。
第三部分：参考答案
一、基础巩固·单项选择
1. C 时间状语 in the early 1980s 表示过去，谓语用一般过去时 depended。depend n 为固定搭配。
2. B BDS-1 是动作承受者，时间为过去，需用一般过去时被动语态 was put int use。
3. C is named 表示"被命名为"，是被动语态。主语 system 是动作承受者。
4. C passing n 作伴随状语，表示"传递"。用现在分词表示与主句动词同时发生的动作。
5. B cmpete against 表示"与……竞争"，符合语境。cmplete 意为"完成"，cntinue 意为"继续"，develp 意为"发展"，均不符合。
二、基础巩固·首字母填空
6. Navigatin Beidu Navigatin Satellite System 意为"北斗导航卫星系统"，navigatin 意为"导航"。
7. cvered cver 意为"覆盖"，句意为"它的服务覆盖了亚太地区"。时间为过去，用过去式 cvered。
8. guide guide 意为"引导、指引"。t guide them 表示"引导他们"，用动词原形。
三、基础巩固·句子改写
9. Its wn system was decided t be develped by China in 1994. 改为被动语态：宾语 its wn system 变为主语，动词变为 was decided t be develped，添加 by China。注意：decide t d sth. 的被动结构为 be decided t be dne。
10. When was BDS-3 cmpleted? 对时间状语 in 2020 提问用 When。被动语态的疑问句结构：Was/Were + 主语 + 过去分词？
四、能力提升·单项选择
1. C ding experiments 与 running tests 并列，作伴随状语，用现在分词形式。
2. B Thanks t 意为"多亏了、由于"，后接名词短语，符合语境。Because 后接从句，In rder t 后接动词，Instead f 意为"而不是"。
3. C 修饰名词 level 需用形容词 glbal（全球的）。glbe 是名词，glbally 是副词。
4. B cntinue t d sth. 意为"继续做某事"。课文原文用 cntinue t imprve，表示未来将继续改进BDS。
五、能力提升·阅读理解
1. C 第一段提到 BDS is ne f the fur glbal navigatin satellite systems，并列出了四个系统：BDS、GPS、GLONASS、Galile，共四个。
2. B 第二段明确指出 depending n anther cuntry's system was nt safe，所以中国决定建立自己的导航系统。
3. B 第三段提到 In 2012, BDS-2 was cmpleted and cvered the Asia-Pacific area，BDS-2 在2012年覆盖亚太地区。
4. C 最后一段提到 BDS guides nt nly ships but als planes, cars, and even farmers' tractrs，说明BDS不仅用于船只，还用于飞机、汽车和拖拉机。选项C正确。
六、能力提升·选词填空
9. depended 句意为"世界依赖美国GPS"，时间为1980年代（过去），用过去式 depended。depend n 依赖。
10. decided 句意为"中国决定开发自己的系统"，decide t d sth. 决定做某事，过去时用 decided。
11. experiments 句意为"他们做实验"，d experiments 做实验，用复数形式。
12. technlgical 修饰名词 prblems 需用形容词 technlgical（技术的）。
13. was put 句意为"BDS-1被投入使用"，被动语态 was put int use。
14. strategy three-step BDS strategy 意为"三步走BDS战略"，strategy 策略。
15. cvered 句意为"它的服务覆盖了亚太地区"，时间为过去，用过去式 cvered。
16. services prviding services 意为"提供服务"，用名词复数 services。
七、拓展延伸
1. B BDS-3 是动作"完成"的承受者，需用被动语态 was cmpleted。选项A缺少助动词 was；选项C和D均非被动结构。
2. B beginning-middle-end 图表用于梳理文章结构（起因—经过—结果），帮助理解和复述课文内容，而非单纯学习词汇或语法。
3. 参考答案：China High-Speed Rail is ne f the greatest technlgical achievements in China. It was develped t make travel faster and mre cnvenient. Tday, the high-speed rail netwrk cnnects many cities acrss the cuntry. In the future, China will cntinue t imprve it and help mre peple travel easily. 评分要点：①写出另一项中国科技成就的名称（1分）；②至少使用一次被动语态（2分）；③内容通顺、语法正确（1分）；④词数不少于40词（1分）。单词
读音
词性
释义
例句
navigatin
/ˌnævɪˈɡeɪʃn/
n.
导航
China's Beidu Navigatin Satellite System (BDS) is ne f the best.
satellite
/ˈsætəlaɪt/
n.
卫星
China's navigatin satellite system is named "Beidu".
system
/ˈsɪstəm/
n.
系统
In 1994, China decided t develp its wn system.
depend n
/dɪˈpend ɒn/
phr.
依赖；取决于
The wrld depended n America's GPS fr navigatin.
develp
/dɪˈveləp/
v.
开发；发展
China decided t develp its wn navigatin system.
research and develpment
/rɪˈsɜːtʃ ənd dɪˈveləpmənt/
phr.
研发
A research and develpment team wrked day and night.
experiment
/ɪkˈsperɪmənt/
n.
实验
The team did experiments and ran tests.
slve
/sɒlv/
v.
解决
They slved technlgical prblems ne by ne.
technlgical
/ˌteknəˈlɒdʒɪkl/
adj.
技术的
The team slved many technlgical prblems.
strategy
/ˈstrætədʒi/
n.
策略
This marked the first step in China's three-step BDS strategy.
experienced
/ɪkˈspɪəriənst/
adj.
有经验的
Experienced engineers wrked clsely with yunger nes.
engineer
/ˌendʒɪˈnɪə(r)/
n.
工程师
Experienced engineers passed n successful experience.
cmpete
/kəmˈpiːt/
v.
竞争
T cmpete against Eurpe and America, the team wrked harder.
glbal
/ˈɡləʊbl/
adj.
全球的
The scientists aimed t make BDS wrk at a glbal level.
ancient
/ˈeɪnʃənt/
adj.
古代的
Ancient Chinese used the seven bright stars t find their ways.
教材例句
结构分析
In 1994, China decided t develp its wn system.
decided（过去式）+ t d（不定式作宾语）
A research and develpment team wrked day and night.
wrked（过去式），表示过去持续的动作
Experienced engineers wrked clsely with yunger nes.
wrked（过去式），描述过去的工作状态
教材例句
结构分析
In 2003, BDS-1 was put int use.
was put int use（was + 过去分词），强调BDS-1被投入使用
In 2012, BDS-2 was cmpleted.
was cmpleted（was + 过去分词），强调BDS-2被建成
In 2020, BDS-3 was cmpleted.
was cmpleted（was + 过去分词），强调BDS-3被建成
China's navigatin satellite system is named "Beidu".
is named（is + 过去分词），强调被命名为
错误
正确
BDS-1 put int use in 2003.
BDS-1 was put int use in 2003.（被动语态需用 was/were + 过去分词）
China decided develping its wn system.
China decided t develp its wn system.（decide t d sth.）
The team wrked hard t cmpete with Eurpe.
The team wrked hard t cmpete against Eurpe.（cmpete against 表示"与……竞争"）
阶段
时间
事件
意义
Beginning（起因）
1980s
世界依赖美国GPS导航
中国意识到需要自主导航系统
第一步
1994–2003
中国决定开发BDS；研发团队日夜攻关；BDS-1投入使用
BDS-1为中国提供服务，标志着三步走战略的第一步
第二步
2003–2012
经验丰富的工程师与年轻人合作；BDS-2建成
BDS-2覆盖亚太地区
第三步
2015–2020
瞄准全球水平；与欧美竞争；BDS-3建成
BDS-3开始为全球提供服务
Future（未来）
未来
中国将继续改进BDS
引领全世界走向正确的方向