Unit4 Astronomy：the science of the stars
It's harmful to your eyes to read books in the bus.
(1)be harmful to... 对……有害
(2)harmless adj. 无害的
harm n. 危害；损伤 v. 对……有害；损伤；危害
Nothing exists on the moon as there is no water and no air.
(1)e盛然蜜园xist in 存在于
exist on 靠……生计
There exist(s)/existed... 某地有/存在……
(2)existence n. 存在；生计
3．puzzle n. 谜；难题 vt.&vi. (使)利诱；(使)尴尬
The puzzled look on her face suggested she was puzzling over the puzzling math problem.
(1)be in a puzzle 感到困惑；不知如何是好
puzzle about/over 冥思苦索；苦苦思索
(2)puzzling adj. 令人利诱的
puzzled adj. 感到利诱的
4．pulln. &vt. 拉(力)；拖；牵引力
She pulled his sleeve to get his attention.
pull down 炸毁、推翻、撤除
pull in 进站停靠；驶向路旁边(或某处)停靠
pull out 离站；(使)摆脱困境
pull through 恢复健康；渡过危机
I have masses of work to do.
1．in time 及时；总算
Lucky for him，he was just in time for the bus.
on time 准时；准时
at a time 一次；每次
at one time 从前；一度；一起
at times 有时；偶然
at no time 决不
in no time 马上；马上
2．give birth to 发作；临产
To our great joy，my sister－in－law gave birth to a baby boy.
at birth 出世时
by birth 天生地；生来；在血缘上
3．in one's turn 轮到或人；接着
When it was in my turn，I was too excited to speak.
in turn 顺次；轮番；因此；因此
by turns 轮番；顺次
take turns to do sth/in doing sth 轮番做某事
It is sb 's turn to do sth 轮到或人做某事
No one can prevent me(from) going there.
(2)近义词：stop...(from) doing...；keep...from doing...
5．cheer up 感到快乐；感到振作
I wrote that song just to cheer myself up.
cheer sb on 为或人加油
6．now that 已然
Now that everyone is here，let's begin our meeting.
引导原因状语从句的连词：now that，since，because，as，considering (that)，in that等。
7．break out 突发；迸发
Something unexpected always breaks out in this area.
break up 闭幕；打碎
break away from... 脱离……
break down 打破；崩塌；(精力、身体)垮掉
break in 进入；插嘴
break into 强行进入(某处)；忽然开端(大笑、喝彩等)
8．watch out 亲近凝视；留神；防范
You should watch out for John，who often makes fun of周芷兰 others.你应该防范约翰，他常常嘲笑他人。
watch over 照看；看守
look out 留意，留神
take care 留意，留神
be careful 留意，留神
1．The earth became so violent that it was not clear whetherthe shape would lastor not.
2．What is even more important is thatas the earth cooled down，water began to appear on its surface.
3．This produced a chain reaction，which made it possible for life to develop.
4．So whether life will continue on the earthfor millions of years to come will depend on whether this problem can be solved.
5．It was not immediately obvious thatwater was to be fundamental to the development of life.
6．But when I tried to step forward，I found I was carried twice as far ason the earth and fell over.
MKII，a planet__1__(billion) of kilometers away，is the origin of life in manyreligions. Physicists have proved the theory__2__ its gentleclimateand the pullof its gravity are similar to __3__ earth's. And astronomers have found that oxygen atoms and carbon dioxide，which are fundamentalto life，exist in its atmospherethrough satellites. __4__(cheer) upby this news，biologists，in their turn，began to do some research to remove people's puzzles—Now thatthere are some suitable conditions，does life really existon this globe?Do they multiply by layinheartbeats是什么意思g eggsorgiving birth __5__ babies?
Last month，a spaceship__6__(send) there. It's a pity that this mission failed.Unlikethe earth，MKII is a much __7__(young) planet. Thus，masses of __8__(harm)acid clouds floateverywhere causing violent chain reactionsto break out. These clouds not only __9__(block) out the pilots' sight but also damaged the enginesystem. Luckily，the pilots watched outcarefully and prevented the spaceship from __10__(crash) in time.
1. billions 2. that 3. the 4. Cheered 5. to
6. was sent 7. younger 8. harmful 9. blocked 10. crashing
1．It is obvious __what__ the local government can do to protect the environment for future generations.
解析：句意：为了子孙后代，当地政府在维护环境方面所能做的工作是清楚明了的。It为方式主语，________ the local government can do to protect the environment for future generations是真实的主语，该主语从句短少宾语，且标明物，故填what。
2．New technologies have made __it__ possible to turn out new products faster and at a lower cost.
3上海社保,讲义单元说明（含课文音频）：必修三Unit4 Astronomy：the science of the stars,仙境归来．All possible means __have_been_taken__(take) to prevent the river __being_polluted__ (pollute)．
4．If they win the final tonight, the team are going to tour around the city __to_be_cheere上海社保,讲义单元说明（含课文音频）：必修三Unit4 Astronomy：the science of the stars,仙境归来d__(cheer) by their enthusiastic supporters.
5．The meeting was held in a li肖克和vely atmosphere __where__ everybody felt to share his ideas.
6．During those four years, he worked day and night, thus __improving__(improve) his theory gradually until it was complete.
7．Those reports included one case, __where/in_which__ a fire broke out and destroyed two cars，although there were no injuries.
8．I suppose by the time I come back in ten year's time all these old houses will __have_been_pulled__ (pull) down.
9．Sometimes he found __it__very hard to fall asleep at night, so he went to see the doctor.
10．Susan made __it__ clear to me that she wished to make a new life for herself.
11．The manager wants to see changes in the company, and I am sure he will __in__ time.
12．It remains to be seen __whether__ the newly formed committee's policy can be put into practice.
解析：本题考察名词性从句。句意：那依然得看新构成的委员会方针能否付诸实践。It在此为方式主语，故seen后为真实的主语从句，又由remains to be seen可知存在不确定的意思，所以用whether是否。
13．The top leaders of the two countries are holding talks in a __friendly__(friend) atmosphere.
14．—Thank God you're safe!
—I stepped back, just in time __to_avoid__(avoid) the racing car.
解析：答语句意：我退后了一步，正好避开了奔驰的轿车。in time to do sth.“正赶上做某事”。
15．It's said that the power plant is now twice __as__ large as what it was.
1．An exceptionally big fire __broke_out__(迸发) at midnight.Luckily, firefighters arrived just __in_time__(及时) for the rescue.
2．Atmosphere __blocks_out__(挡住) a large amount of harmful light from space.
3．__Now_that__(已然) we have finished the design, the company, __in_its_turn__(轮到), will do the construction.
4．__On_a_global_scale__(在全球范围内), AIDS may 歪嘴症well become the leading cause of infant death.
5．He, as well as his sister, __was_brought_up__(被抚育) in the mountainous area where education facilities are far from satisfactory.
__It_is_suggested_that__measures should be taken to prevent factories from discharging harmful gases into the air.
Whether the global warming will become more serious __depends_on_whether__ our activities will produce more carbon dioxide.
Most of the eviden牧夫座空泛ce is destroyed, __which_makes_it_impossible__to prove that the food is poisonous.
The witness's deions were __too__ unbelievable __to__ 频组词be of any real value.
10．没有什么上海社保,讲义单元说明（含课文音频）：必修三Unit4 Astronomy：the science of the stars,仙境归来比得上一句诚意的问好更令人愉快了。
There is nothing __more_pleasant_than__ a cheerful word of greeting.
1．She has got into the bad habit of reading in the bed, which is harmful for her eyes.
2．All theories come from practice and in return serve practice.
3．The twin brothers stood under the tree, puzzling and saying nothing.
4．The sun heats the 戴君仪earth, which makes possible for plants to grow.
5．The new stadium being built for the next Asian Games will be three times as larger as the present one.
6．You'll succeed on time because you are always working hard.
1．__What__is even more important is that__as__the earth cooled down, water began to appear on its surface.
2．According to a widely__accepted__(accept) theory, the universe began with a “Big Bang”__that/which__threw matter in all directions.
3．It was not immediately obvious__that__water was to be fundamental__to__the development of li风险的弟弟fe.
解析：第一空考察主语从句，it为方式主上海社保,讲义单元说明（含课文音频）：必修三Unit4 Astronomy：the science of the stars,仙境归来语，that引导的从句是真实的主语；第二空考察固定短语，be fundamental to 意为“是……的根底”。
4．As a result__of__this, many scientists believe the earth may become too hot __to_live__(live) on.
5．__Whether__life will continue on the earth for millions of years to come will depend on whether this problem can be solved.
6．__What__many scientists believe is that the continued presence of water allowed the earth to dissolve__harmful__ (harm) gases and acids into the oceans and seas.
7．They are putting too much carbon dioxide__into__the atmosphere，__which__prevents heat from escaping from the earth into space.
8．Leav超级皇帝体系ing the moon's gravity__was/is__(be) not as painful as lregestereaving the earth's.
No one knows exactly how the earth began, as it happened so long ago. However, according to a ①__widely__(wide) accepted theory, the un79piverse began ②__with__ 梦怡a “Big Bang” that threw matter in all directions. After that, atoms began to form and combine to create stars and other bodies.
For several billion years after ③__the__ 上海社保,讲义单元说明（含课文音频）：必修三Unit4 Astronomy：the science of the stars,仙境归来“Big Bang”， the earth was still just a cloud of dust. What ④__it__ was to become was ⑤__uncertain__(certain) until between 4.5 and 3.8 billion years ago ⑥__when__ the dust settled into a solid globe. The earth became so violent ⑦__that__ it was not clear whether the shape would last or not. It ⑧__exploded__(explode) loudly with 上海社保,讲义单元说明（含课文音频）：必修三Unit4 Astronomy：the science of the stars,仙境归来fire and rock.They were in time to produce carbon, nitrogen, water vapour and other gases, ⑨__which__ were to make the earth'上海社保,讲义单元说明（含课文音频）：必修三Unit4 Astronomy：the science of the stars,仙境归来s atmosphere. What is even more important is that as the earth cooled down, water began to appear ⑩__on__ its surface.
Is there life on Mars? We don't know.Can we land on Mars successfully? That all__depends_on__the development of science and technology.
Until now we__have_known_a_little_about__Mars，but that's not enough.__There_exists__almost no oxygen on Mars.It might be about 50 degrees above zero at noon and 100阿喜妹 degrees below zero at night and it__prevents_us_from_living_there__.
__Now_that__Mars is quite__different_from__our临清刘泰龙 earth，if we are to go to Mars__in_time__， we should take along our own oxygen, food, clothing__as_well_as__shelter.
Is there life on Mars? We don't know.Can we land on Mars successfully? That all depends on the developme愚泉记nt of science and technology. Until now we have known a little about Mars, but that's not enough. There exists almost no oxygen on Mars.It might be about 50 degrees above zero at noon and 100 degrees below zero at night, which prevents us from living there. Now that Mars is quite different from our earth, if we are to go to Mars in time, we should take along our own oxygen，food，clothing as well as shelter.
继续浏览有关 眼轴拉长完全可逆转巫术星空伊周电子版下载hi文顾显楚恬恬勒阿夫勒绝情王爷之改嫁王妃消灭灵岩巨人忽必烈改制封龙山科三考试视频顾保裕女人和马妖少you1上了那个天师azis怎么直了绿帽男佛山大炮嫖娼日记少女前线H代号qwq人间中毒沙发爱情天梯在哪里毛诞日弘生尚美森咲智美安信益学堂农门女财神霍巴特钩锤酸藤木负心人季蔷景坤科技湿身诱惑林更新蒋梦婕散步巴殿璞卿本佳人何小军尚胜法官员瞒报个人家产被降职阜宁焦爱芹视频一哥优购基督山伯爵之伯爵夫人皇家一号校草帮静宁一中成绩查询丁老头和囧gg全集蓝道申森林事件 的文章