外研版 选修八 Module 5 The Conquest of the Universe一轮复习课件（54张PPT）
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| 名称 | 外研版 选修八 Module 5 The Conquest of the Universe一轮复习课件（54张PPT） |  | |
| 格式 | ppt | ||
| 文件大小 | 2.7MB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 外研版 | ||
| 科目 | 英语 | ||
| 更新时间 | 2023-04-20 08:00:51 | ||
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(共54张PPT)
2023年高考英语复习专题课件★★★
1．a space flight 一次太空飞行
2．orbit the earth 绕地球飞行
3．in the universe 在宇宙中
4．outer/deeper space 外太空
5．the solar system 太阳系
6．space exploration太空探索
7．manned/unmanned spacecraft 载人/无人飞船
8．send a spacecraft to the moon 向月球发射飞船
9．have access to space travel 能到太空旅行
10．explore the mysteries of the universe 探索宇宙的奥秘
11．weather satellite 气象卫星
12．space suits 太空服
13．soar into the sky 冲向天空
14．feel the gravity 感受到重力
15．specialize in astronomy 专攻天文学
16．communication satellite 通信卫星
17．time capsule 时空舱
18．escape the pull of the earth’s gravity 逃离地球的引力
1．Little as/though we know about the universe，the development of science and technology will make it possible to know how the universe came into existence．
尽管我们对宇宙所知甚少，科学技术的发展会让我们知道宇宙是如何形成的成为可能。
2．Now that the world is still at the very beginning of its voyage into space，there are a lot waiting for us to get the hang of．
既然这个世界依然只处于太空旅行的初级阶段，仍有很多事情有待我们掌握。
3．What I know is that this was the start of a new age of space travel．
我所知道的是这是太空旅行新时代的开端。
NO．1 单词——在语境中应用，在拓展中巩固
01核心词汇…………………………………………
请根据汉语提示完成下列词块
1．grow __________ to the dark 慢慢适应了黑暗
2．a _______ to the killing 这件杀人案的一个目击者
3．the __________ background of/to World War Ⅱ 第二次世界大战的历史背景
accustomed
witness
historical
4．_____ that balloon 把那个气球弄炸了
5．challenge a ____ 质疑某个观点
6．___________ one’s error承认错误
7．good/bad _____ 好事/坏事
8．suffer a ______ 遭受挫败
9．______ him of lying指责他说谎
10．with the ___ of在……帮助下；借助于
burst
view
acknowledge
deeds
defeat
accuse
aid
11．study a _____ range of subjects 所学的科目范围很广
12．the environmental ______ of tourism旅游事业对环境的影响
02拓展词汇…………………………………………
[先识记]
1．assume v．假定，假设→ ________ conj．如果→ __________ n．假定，假设
2．advance v．& n．前进；进展 → ________ adj．高级的，先进的
broad
impact
assuming
assumption
advanced
3．depend v．依靠；取决于→ _________ adj．依赖的→ __________ n．依赖，依靠→ ____________ n．(反义词)独立
4．relief n．安慰；宽慰→ _______ vt．安慰
5．devote v．献身，致力→ ________ n．忠诚→ _______ adj．忠诚的
6．consult v．咨询；请教→ __________ n．顾问
7．observe v．观察→ ___________ n．观察；监视
dependent
dependence
independence
relieve
devotion
devoted
consultant
observation
[再运用]
请填入括号内单词的正确形式
1．At first，Anne totally ________ on Jack，her husband．After many years of struggle，she gained her ____________ and now she is _________ on herself to lead a new life．(depend)
2．Mr．Black is my _______ friend．He _______ his life to doing scientific research．I respect his ________ to science．(devote)
depended
independence
dependent
devoted
devotes
devotion
3．It was first _______ that he was the murderer，but later it turned out to be a false __________．(assume)
4．With the help of the ________ technology，we can complete the task in _______．(advance)
03阅读词汇…………………………………………
标注不认识的单词，回查单词表重新记忆
□leap n． □tune v．
□historic adj． □random adj．
□tension n． □authority n．
assumed
assumption
advanced
advance
□swear v． □burst v．
□latter n． □grasp n．
□abstract adj． □foresee v．
□destiny n． □sympathy n．
□commitment n． □consistent adj．
□faith n． □dignity n．
□pray v． □acute adj．
□stable adj． □dramatic adj．
□deliberately adv． □glory n．
NO．2 短语——在拼写中记牢，在联想中积累
[必会短语]
请根据汉语提示完成下列词块
1．_____________ 不管
2．__________________________ the lecture在讲座的起始部分
3．put forward _____________ questions提出了一系列问题
4．______ sb． __ unfair competition 指控某人不正当竞争
in spite of
at the very beginning of
a series of
accuse
of
5．_________ 祈望；祈求
6．the opinions ___________ his和他的看法相似的观点
7．_______________ 开始；调动；引发
8．________ 成功；准时到达
9．achieve what he ________ to do three years ago实现了他3年前的奋斗目标
10．take very long to _______________________ the way of learning English花很长的时间去习惯学英语的方法
pray for
similar to
set in motion
make it
set out
get/be accustomed to
[词汇积累]
1．“悲伤”一族
①sorrow n．悲伤；悲痛
②sorrowful adj． 悲伤的
③heartbroken adj． 悲伤的
④sadness n． 悲哀
⑤grief n． 悲痛；忧伤
⑥miserable adj． 悲惨的
⑦mournful adj． 悲哀的
2．无被动语态短语小结
①break out 爆发
②belong to 属于
③consist of 由……组成
④come true 变成现实
⑤take place 发生
⑥date from/back to追溯到
3．聚焦“对……有影响”短语
①make/have an impact on
②have an effect on
③have an influence on/upon
④impact on/upon
⑤make a difference to
NO．3 句式——在解读中学懂，在学写中学通
[重点句式]
请根据汉语提示完成下列句子
1．“no＋比较级＋than”，表示“同……一样不”
She’s _______________________ the others．
她的能力并不比别人弱。
no less capable than
2．否定词前置，句子用部分倒装
__________________ to theater, but now it is different．
以前我很少去剧院，但是现在不同了。
3．as/though 引导的让步状语从句，应使用倒装结构
__________________________, Wednesday night was a quiet night．
令人惊讶的是，星期三晚却是一个安静的夜晚。
Seldom did I go
Amazing as it may seem
[句式积累]
1．The novel is no more interesting than the one bought by me．
2．Little did Rose care about her own safety，though she herself was in great danger．
3．Teacher as/though he is，he can’t know everything．
(1)be accustomed to (doing) sth．＝be used to (doing) sth．习惯于做某事(状态)
get/become accustomed to (doing) sth．＝get/become used to (doing) sth．习惯于做某事(动作)
(2)accustom vt． 使……习惯于
accustom oneself to (doing) sth．使自己习惯于做某事
单句语法填空/句式升级/单句改错
①For those __________ (accustom) to a comfortable life，the change to remote areas must have been very hard indeed．
②I am accustomed to living/accustom myself to living in the countryside，and I always find it hard to live in the city．
→____________________________________,I always find it hard to live in the city．(过去分词短语作状语)
accustomed
Accustomed to living in the countryside
→_____________________________________________, I always find it hard to live in the city．(现在分词短语作状语)
③—They are quiet，aren’t they
—Yes．They are accustomed to not talk at meals．_____________
Having accustomed myself to living in the countryside
talk→talking
[佳句背诵] It is generally assumed that stress is caused by too much work．
人们普遍认为，压力是工作过重所致。
(1)assume that… 假定，认为……
assume…to be… 认为……是……；假定……是……
(2)assuming that 假定……(作状语)
(3)assumption n． 假定；假设
assumed
assumption
③If there wasn’t the hard work of the dustman，what can you imagine our environment will be like
→__________________ there wasn’t the hard work of the dustman，what can you imagine our environment will be like
Assuming (that)
(1)acknowledge doing sth． 承认做了某事
acknowledge sth．/that…承认……
acknowledge sb．as…/to be… 认为……是……(常用于被动语态)
(2)It is widely/universally acknowledged that…大家公认……
acknowledged
being defeated
③大家公认这个音乐节是探索中国民间音乐的绝佳机会。
The music festival ___________________________ a best opportunity to explore Chinese folk music．(简单句)
＝___________________________ the music festival is a best opportunity to explore Chinese folk music．(复合句)
is widely acknowledged as/to be
It is widely acknowledged that
[佳句背诵] You’d better not consult a dictionary every time you come across a new word．
你最好不要每次遇到生词就查字典。
(1)consult with sb． 与某人商量，与某人磋商
consult sb．about sth． 就某事请教/咨询某人
consult the/a dictionary 查字典
(2)consultant n． [C]顾问；会诊医生
单句语法填空/句式升级/单句改错
①He often goes to my office to consult me _____ the method of learning English．
②I’m a 34 year old man，married，live in a nice house，and have a successful career as an educational __________ (consult)．
③After I consulted with my teacher，I made up my mind to major in English．
about
consultant
→_________________________________,I made up my mind to major in English．(现在分词短语作状语)
④To work out the difficult maths problem，I have consulted about Professor Russell several times．_________
[实战贴士] 关于“查词典”的表达法有consult a/the dictionary，refer to a/the dictionary，look up a word in a/the dictionary等。
Having consulted with my teacher
去掉about
(1)accuse sb．of (doing) sth．＝charge sb．with (doing) sth． 指责/控告某人(做)某事
accuse sb．as… 控告/指责某人为……
(2)the accused 被告
(3)accusation n．控告，指控；谴责
of
accused
③他被指责考试作弊，这让我们很吃惊。
He ________________________________,which surprised us all．(accuse)
＝He _________________________________, which surprised us all．(charge)
was accused of cheating in the exam
was charged with cheating in the exam
[实战贴士] 与accuse sb．of sth．意义相近的短语：
condemn sb．for (doing) sth．谴责某人……
blame sb．for (doing) sth．责备某人……
scold sb．for (doing) sth．指责某人……
Despite/In spite of
Despite the previous rounds of talks
[实战贴士] in spite of (＝despite)是介词短语，后跟名词、代词或动名词作让步状语；而though，although或as是从属连词，后跟让步状语从句。
it
it
Hold tight to your dream and you’ll make it sooner or later.
(1)本句为主从复合句，incredible as it may seem是由as引导的让步状语从句，其中incredible as it may seem＝although it may seem incredible。
(2)as引导让步状语从句时，从句需倒装，as可替换为though。其结构为：
①单数可数名词(无冠词)/形容词＋as/though＋主语＋be＋其他成分；
②动词原形＋as/though＋主语＋助动词/情态动词＋其他成分；
③副词＋as/though＋主语＋谓语动词＋其他成分。
as/though
Although/Though
③Although the night air was hot，we slept deeply because we were so tired after the long journey．
→________________________________,we slept deeply because we were so tired after the long journey．(倒装句)
④Child although he is，he has a wide range of science knowledge．__________________
[实战贴士] (1)though引导让步状语从句时，可用倒装语序，也可用正常语序；although引导让步状语从句时不能用倒装语序。
(2)although/though可以与yet，still连用，但是不能与but连用。
Hot as/though the night air was
although→as/though
Ⅰ．熟词生义
1．(2020·新高考全国Ⅰ卷) However，her children have learned an important lesson witnessing their mother earn her degree．____
2．(2020·全国Ⅱ卷)Those viewing the quality of Abbot Hall’s temporary exhibitions may be forgiven for thinking they are in a city gallery．____
观看
见证
3．(2019·江苏卷)However，they have real impacts，as they result in misguided use of scarce resources．____
4．(2019·江苏卷)We assume that a large brain makes huge advantages．____
Ⅱ．语法填空
In China，people have become accustomed to 1．______ (buy) some products to lose weight．2．________ (assume) that they would become slim after taking some 3．________ (advance) medicine，they
影响
假设
buying
Assuming
advanced
have devoted lots of money to it．Hard 4．__________ they tried，they still couldn’t make 5．__．They are aware of being cheated gradually．So such companies were 6．_______ (accuse) of using misleading advertisements in their promotion of the weight loss pills．We should set in motion to solve such bad behaviour．7．__ spite of some measures taken to settle the problem，some things remain 8．______________ (solve)．But we need 9．________ (patient) because achieving this needs a process．To our 10．______ (relieve)，people have raised the awareness of protecting their own rights．
as/though
it
accused
In
to be solved
patience
relief
Ⅲ．运用本单元所学词汇、短语或句型完成下面的小作文
假定你是李华，打算写一篇短文介绍人类对火星的探测情况，写作要点如下：
1．对火星了解甚少，但已开始探测，30多个探测器已到达火星；
2．火星表面与地球表面相似，但是否有生命仍待研究。
Space technology ①______________ (witness) a series of historical successes in the last decade．②_____________________ ___________ (little；though；we；know；Mars)，man has ③_____________________ (set；out；explore) Mars．
So far，more than 30 probes have made it to Mars．In spite of that，④__________________________ (it；be；acknowledge) we ought to know more about Mars．Though its surface is similar to that of the earth，whether there is life on Mars depends on further research．
has witnessed
Little though we know
about Mars
set out to explore
it is acknowledged that
2023年高考英语复习专题课件★★★
1．a space flight 一次太空飞行
2．orbit the earth 绕地球飞行
3．in the universe 在宇宙中
4．outer/deeper space 外太空
5．the solar system 太阳系
6．space exploration太空探索
7．manned/unmanned spacecraft 载人/无人飞船
8．send a spacecraft to the moon 向月球发射飞船
9．have access to space travel 能到太空旅行
10．explore the mysteries of the universe 探索宇宙的奥秘
11．weather satellite 气象卫星
12．space suits 太空服
13．soar into the sky 冲向天空
14．feel the gravity 感受到重力
15．specialize in astronomy 专攻天文学
16．communication satellite 通信卫星
17．time capsule 时空舱
18．escape the pull of the earth’s gravity 逃离地球的引力
1．Little as/though we know about the universe，the development of science and technology will make it possible to know how the universe came into existence．
尽管我们对宇宙所知甚少，科学技术的发展会让我们知道宇宙是如何形成的成为可能。
2．Now that the world is still at the very beginning of its voyage into space，there are a lot waiting for us to get the hang of．
既然这个世界依然只处于太空旅行的初级阶段，仍有很多事情有待我们掌握。
3．What I know is that this was the start of a new age of space travel．
我所知道的是这是太空旅行新时代的开端。
NO．1 单词——在语境中应用，在拓展中巩固
01核心词汇…………………………………………
请根据汉语提示完成下列词块
1．grow __________ to the dark 慢慢适应了黑暗
2．a _______ to the killing 这件杀人案的一个目击者
3．the __________ background of/to World War Ⅱ 第二次世界大战的历史背景
accustomed
witness
historical
4．_____ that balloon 把那个气球弄炸了
5．challenge a ____ 质疑某个观点
6．___________ one’s error承认错误
7．good/bad _____ 好事/坏事
8．suffer a ______ 遭受挫败
9．______ him of lying指责他说谎
10．with the ___ of在……帮助下；借助于
burst
view
acknowledge
deeds
defeat
accuse
aid
11．study a _____ range of subjects 所学的科目范围很广
12．the environmental ______ of tourism旅游事业对环境的影响
02拓展词汇…………………………………………
[先识记]
1．assume v．假定，假设→ ________ conj．如果→ __________ n．假定，假设
2．advance v．& n．前进；进展 → ________ adj．高级的，先进的
broad
impact
assuming
assumption
advanced
3．depend v．依靠；取决于→ _________ adj．依赖的→ __________ n．依赖，依靠→ ____________ n．(反义词)独立
4．relief n．安慰；宽慰→ _______ vt．安慰
5．devote v．献身，致力→ ________ n．忠诚→ _______ adj．忠诚的
6．consult v．咨询；请教→ __________ n．顾问
7．observe v．观察→ ___________ n．观察；监视
dependent
dependence
independence
relieve
devotion
devoted
consultant
observation
[再运用]
请填入括号内单词的正确形式
1．At first，Anne totally ________ on Jack，her husband．After many years of struggle，she gained her ____________ and now she is _________ on herself to lead a new life．(depend)
2．Mr．Black is my _______ friend．He _______ his life to doing scientific research．I respect his ________ to science．(devote)
depended
independence
dependent
devoted
devotes
devotion
3．It was first _______ that he was the murderer，but later it turned out to be a false __________．(assume)
4．With the help of the ________ technology，we can complete the task in _______．(advance)
03阅读词汇…………………………………………
标注不认识的单词，回查单词表重新记忆
□leap n． □tune v．
□historic adj． □random adj．
□tension n． □authority n．
assumed
assumption
advanced
advance
□swear v． □burst v．
□latter n． □grasp n．
□abstract adj． □foresee v．
□destiny n． □sympathy n．
□commitment n． □consistent adj．
□faith n． □dignity n．
□pray v． □acute adj．
□stable adj． □dramatic adj．
□deliberately adv． □glory n．
NO．2 短语——在拼写中记牢，在联想中积累
[必会短语]
请根据汉语提示完成下列词块
1．_____________ 不管
2．__________________________ the lecture在讲座的起始部分
3．put forward _____________ questions提出了一系列问题
4．______ sb． __ unfair competition 指控某人不正当竞争
in spite of
at the very beginning of
a series of
accuse
of
5．_________ 祈望；祈求
6．the opinions ___________ his和他的看法相似的观点
7．_______________ 开始；调动；引发
8．________ 成功；准时到达
9．achieve what he ________ to do three years ago实现了他3年前的奋斗目标
10．take very long to _______________________ the way of learning English花很长的时间去习惯学英语的方法
pray for
similar to
set in motion
make it
set out
get/be accustomed to
[词汇积累]
1．“悲伤”一族
①sorrow n．悲伤；悲痛
②sorrowful adj． 悲伤的
③heartbroken adj． 悲伤的
④sadness n． 悲哀
⑤grief n． 悲痛；忧伤
⑥miserable adj． 悲惨的
⑦mournful adj． 悲哀的
2．无被动语态短语小结
①break out 爆发
②belong to 属于
③consist of 由……组成
④come true 变成现实
⑤take place 发生
⑥date from/back to追溯到
3．聚焦“对……有影响”短语
①make/have an impact on
②have an effect on
③have an influence on/upon
④impact on/upon
⑤make a difference to
NO．3 句式——在解读中学懂，在学写中学通
[重点句式]
请根据汉语提示完成下列句子
1．“no＋比较级＋than”，表示“同……一样不”
She’s _______________________ the others．
她的能力并不比别人弱。
no less capable than
2．否定词前置，句子用部分倒装
__________________ to theater, but now it is different．
以前我很少去剧院，但是现在不同了。
3．as/though 引导的让步状语从句，应使用倒装结构
__________________________, Wednesday night was a quiet night．
令人惊讶的是，星期三晚却是一个安静的夜晚。
Seldom did I go
Amazing as it may seem
[句式积累]
1．The novel is no more interesting than the one bought by me．
2．Little did Rose care about her own safety，though she herself was in great danger．
3．Teacher as/though he is，he can’t know everything．
(1)be accustomed to (doing) sth．＝be used to (doing) sth．习惯于做某事(状态)
get/become accustomed to (doing) sth．＝get/become used to (doing) sth．习惯于做某事(动作)
(2)accustom vt． 使……习惯于
accustom oneself to (doing) sth．使自己习惯于做某事
单句语法填空/句式升级/单句改错
①For those __________ (accustom) to a comfortable life，the change to remote areas must have been very hard indeed．
②I am accustomed to living/accustom myself to living in the countryside，and I always find it hard to live in the city．
→____________________________________,I always find it hard to live in the city．(过去分词短语作状语)
accustomed
Accustomed to living in the countryside
→_____________________________________________, I always find it hard to live in the city．(现在分词短语作状语)
③—They are quiet，aren’t they
—Yes．They are accustomed to not talk at meals．_____________
Having accustomed myself to living in the countryside
talk→talking
[佳句背诵] It is generally assumed that stress is caused by too much work．
人们普遍认为，压力是工作过重所致。
(1)assume that… 假定，认为……
assume…to be… 认为……是……；假定……是……
(2)assuming that 假定……(作状语)
(3)assumption n． 假定；假设
assumed
assumption
③If there wasn’t the hard work of the dustman，what can you imagine our environment will be like
→__________________ there wasn’t the hard work of the dustman，what can you imagine our environment will be like
Assuming (that)
(1)acknowledge doing sth． 承认做了某事
acknowledge sth．/that…承认……
acknowledge sb．as…/to be… 认为……是……(常用于被动语态)
(2)It is widely/universally acknowledged that…大家公认……
acknowledged
being defeated
③大家公认这个音乐节是探索中国民间音乐的绝佳机会。
The music festival ___________________________ a best opportunity to explore Chinese folk music．(简单句)
＝___________________________ the music festival is a best opportunity to explore Chinese folk music．(复合句)
is widely acknowledged as/to be
It is widely acknowledged that
[佳句背诵] You’d better not consult a dictionary every time you come across a new word．
你最好不要每次遇到生词就查字典。
(1)consult with sb． 与某人商量，与某人磋商
consult sb．about sth． 就某事请教/咨询某人
consult the/a dictionary 查字典
(2)consultant n． [C]顾问；会诊医生
单句语法填空/句式升级/单句改错
①He often goes to my office to consult me _____ the method of learning English．
②I’m a 34 year old man，married，live in a nice house，and have a successful career as an educational __________ (consult)．
③After I consulted with my teacher，I made up my mind to major in English．
about
consultant
→_________________________________,I made up my mind to major in English．(现在分词短语作状语)
④To work out the difficult maths problem，I have consulted about Professor Russell several times．_________
[实战贴士] 关于“查词典”的表达法有consult a/the dictionary，refer to a/the dictionary，look up a word in a/the dictionary等。
Having consulted with my teacher
去掉about
(1)accuse sb．of (doing) sth．＝charge sb．with (doing) sth． 指责/控告某人(做)某事
accuse sb．as… 控告/指责某人为……
(2)the accused 被告
(3)accusation n．控告，指控；谴责
of
accused
③他被指责考试作弊，这让我们很吃惊。
He ________________________________,which surprised us all．(accuse)
＝He _________________________________, which surprised us all．(charge)
was accused of cheating in the exam
was charged with cheating in the exam
[实战贴士] 与accuse sb．of sth．意义相近的短语：
condemn sb．for (doing) sth．谴责某人……
blame sb．for (doing) sth．责备某人……
scold sb．for (doing) sth．指责某人……
Despite/In spite of
Despite the previous rounds of talks
[实战贴士] in spite of (＝despite)是介词短语，后跟名词、代词或动名词作让步状语；而though，although或as是从属连词，后跟让步状语从句。
it
it
Hold tight to your dream and you’ll make it sooner or later.
(1)本句为主从复合句，incredible as it may seem是由as引导的让步状语从句，其中incredible as it may seem＝although it may seem incredible。
(2)as引导让步状语从句时，从句需倒装，as可替换为though。其结构为：
①单数可数名词(无冠词)/形容词＋as/though＋主语＋be＋其他成分；
②动词原形＋as/though＋主语＋助动词/情态动词＋其他成分；
③副词＋as/though＋主语＋谓语动词＋其他成分。
as/though
Although/Though
③Although the night air was hot，we slept deeply because we were so tired after the long journey．
→________________________________,we slept deeply because we were so tired after the long journey．(倒装句)
④Child although he is，he has a wide range of science knowledge．__________________
[实战贴士] (1)though引导让步状语从句时，可用倒装语序，也可用正常语序；although引导让步状语从句时不能用倒装语序。
(2)although/though可以与yet，still连用，但是不能与but连用。
Hot as/though the night air was
although→as/though
Ⅰ．熟词生义
1．(2020·新高考全国Ⅰ卷) However，her children have learned an important lesson witnessing their mother earn her degree．____
2．(2020·全国Ⅱ卷)Those viewing the quality of Abbot Hall’s temporary exhibitions may be forgiven for thinking they are in a city gallery．____
观看
见证
3．(2019·江苏卷)However，they have real impacts，as they result in misguided use of scarce resources．____
4．(2019·江苏卷)We assume that a large brain makes huge advantages．____
Ⅱ．语法填空
In China，people have become accustomed to 1．______ (buy) some products to lose weight．2．________ (assume) that they would become slim after taking some 3．________ (advance) medicine，they
影响
假设
buying
Assuming
advanced
have devoted lots of money to it．Hard 4．__________ they tried，they still couldn’t make 5．__．They are aware of being cheated gradually．So such companies were 6．_______ (accuse) of using misleading advertisements in their promotion of the weight loss pills．We should set in motion to solve such bad behaviour．7．__ spite of some measures taken to settle the problem，some things remain 8．______________ (solve)．But we need 9．________ (patient) because achieving this needs a process．To our 10．______ (relieve)，people have raised the awareness of protecting their own rights．
as/though
it
accused
In
to be solved
patience
relief
Ⅲ．运用本单元所学词汇、短语或句型完成下面的小作文
假定你是李华，打算写一篇短文介绍人类对火星的探测情况，写作要点如下：
1．对火星了解甚少，但已开始探测，30多个探测器已到达火星；
2．火星表面与地球表面相似，但是否有生命仍待研究。
Space technology ①______________ (witness) a series of historical successes in the last decade．②_____________________ ___________ (little；though；we；know；Mars)，man has ③_____________________ (set；out；explore) Mars．
So far，more than 30 probes have made it to Mars．In spite of that，④__________________________ (it；be；acknowledge) we ought to know more about Mars．Though its surface is similar to that of the earth，whether there is life on Mars depends on further research．
has witnessed
Little though we know
about Mars
set out to explore
it is acknowledged that