nit 4 Astronomy：The science of the stars

1. spread vt.&vi. 展開,鋪開;散布;擴大;延伸

The bird spread its wings. 那只鳥展開了翅膀。

Flies spread disease. 蒼蠅傳播疾病。

常用結構:

spread sth. with sth. 用……抹/涂/鋪……

spread ...on ...把……抹/涂/鋪在……

be spread for擺好（桌子）準備

spread oneself\[口\]舒展四肢(躺下)

spread out張開，伸開，鋪開，展開，伸長

單項填空

Paper making began in China and _____________to Europe.

A. Spread B. grew C. Carried D. developed

解析:選A。句意為：造紙術起源于中國，又傳播到了歐洲。spread傳播。

2. method n. 方法

He has introduced a new method of teaching.他引進了一種新的教學方法。

What is the most effective method of birth control?控制出生率的最有效的方法是什么？

聯(lián)想拓展

by this means=in this way=with this method 用這種方法

易混辨析 method/means

method側重"理論方法"，指做某事的具體步驟或程序。

a new teaching method一種新的教學方法

means（單復數同形）側重"通過手段"或"利用工具"去達到某種目的。

選詞填空(method/means)（原創(chuàng)）

①The quickest of travel _____________is by plane.

②She has a very scientific _____________of dealing with political problems.

答案：①means②method

3. harmful adj. 有害的

常用結構:

do sb. harm/do harm to sb. 對某人有害

mean no harm 無意傷害別人;沒有惡意

harm one's image/reputation 損害某人的形象/名聲

do more harm than good 弊大于利

There is no harm in (sb's) doing sth.

=It does no harm (for sb.) to do sth. (某人) 做某事無害處

be harmful to 對……有害

harm n.&v. 損害，傷害

Smoking is harmful to your health. 吸煙有害健康。

【活學活用】

(1)As we all know, the polluted water and air are harmful to people's health. 眾所周知,污染了的水和空氣對人的健康有害。

(2)The local government decided to close down some factories which had done a lot of harm to the environment.當地政府決定關閉一些對環(huán)境造成重大損害的工廠。

(3)Scientists do not know how much and what kinds of noise do harm to (=　________) ocean animals. 對于危害海洋動物的噪聲的強度和種類,科學家們并不了解。

(4)語法填空。

①It never occurred to him that his carelessness could do such great harm____________himself.

②They may not be able to help but there's no harm in ____________(ask) them.

③Apparently, you were cracking a ____________(harm) joke, but she was terribly scared.

答案：(3)are harmful to　(4)①to?、赼sking?、踙armless

單項填空

He is a nice dog. He won't do you any____________ .

A.ill B. bite C. hurt D. harm

解析:選D?？疾楣潭ù钆洹o sb. harm/do harm to sb. 表示"對某人有害"。句意為：這是一條溫順的狗，它不會傷害你。故選D。

4. mass n. 質量；團；塊；大量；(前加the) 群眾

A liter of gas has less mass than a liter of water.1公升氣體的質量少于1公升水的質量。

She has a mass of things to do.她有一大堆的事情要做。

The masses have boundless creative power.人民群眾有無限的創(chuàng)造力。

常用結構:

be a mass of 遍體是……; 充滿了……

in mass 全部, 全體; 整個地

in the mass 總體上;總的說來

the (great) mass of 大多數, 大部分

masses of sth.大量的東西

單項填空

The young dancers looked so charming in their beautiful clothes that we took _____________pictures of them.

A. many of B. masses of C. the number of D. a large amount of

解析:選B。句意為：年輕的舞蹈家們穿著美麗的衣服看起來很迷人，因此我們給他們拍了許多照片。masses of=lots of，后跟復數名詞。

5. pull v. 拉，拖，拔；移動 n.拉，拖；牽(引)力

You push and I'll pull. 你來推，我來拉。

I felt a pull at my sleeve and turned round. 我覺得有人扯我的袖子，便轉過身來。

常用結構:

pull ahead (of sb./sth.) 領先于（某人/物）

pull (sb.) back（使某人）退卻；撤回（某人）

pull off (sth.)（指機動車輛）駛離（道路至路側停車處停下）

pull out (sth.) 拉掉；使分離；掏出；駛離（車站）

pull on 穿，戴上（襪子、手套等）

pull together 同心協(xié)力；通力合作

【活學活用】

(1)You'll find my mother in the garden as usual, pulling up weeds.

你會像平時一樣在花園里找到我的母親,她在拔草。(拔出)

(2)I stepped outside and pulled up my collar against the cold mist.

我走出門,豎起衣領抵御冷霧。(豎起,拉起)

(3)The policeman pulled up the motorist and asked to see his driving licence.

警察讓那個駕駛員停車,要看他的駕照。(停車)

(4)用pull相關短語的適當形式填空。

①The policeman signalled the driver to_____________his car so that he could check his licence.

②When all passengers were on board, the train _____________of the station.

③Her family wondered if she could _____________after the operation.

④Crowds jammed in for seats when the train_____________.

⑤The earthquake_____________most of the buildings in the city.

⑥The express from Beijing_____________on time.

答案：(4)①pull over?、趐ulled out　③pull through　④pulled up?、輕ulled down?、辮ulled in

用pull相關短語的適當形式填空

①I arrived as the last train was _____________.

②He _____________a gun and aimed at the criminal.

③So long as we_____________ , there's no mountain top we can't conquer.

答案：①pulling out②pulled out③pull together

6. cheer vt. & vi. (使)高興、振奮；(對)歡呼

The crowd cheered loudly as the Queen appeared.女王出現時群眾高聲歡呼。

He was greatly cheered by the news.他聽到這個消息非常高興。

常用結構:

cheer sb. on為某人加油

cheer (sb.) up（使某人）更高興；（使）振奮起來

聯(lián)想拓展

cheerful adj.高興的

cheerless adj.不高興的；陰冷的

用cheer相關短語的適當形式填空（原創(chuàng)）

①Your visit has greatly _____________him up.

②The crowd _____________the runners _____________as they started the last lap.

答案：①cheered②cheered ;on

7. puzzle vt.&vi.（使）迷惑；（使）苦思 n.迷；難題

puzzled adj. 無法了解的；困惑的

puzzling adj. 令人費解的

Her reply puzzled me.她的回答把我弄糊涂了。

Their reason for doing it is still a puzzle to me.他們?yōu)槭裁匆菢幼龃耸挛胰愿械侥涿睢?/p>

常用結構：

sb. be puzzled by sth.某人對……感到迷惑

puzzle about/over sth.對某事感到迷惑

puzzle one's brain冥思苦想；絞盡腦汁

solve a puzzle解決一個難題

[溫馨提示] puzzled意為“迷惑的,不解的”,往往用于指人或人的表情、臉色、聲音等;puzzling意為“令人迷惑的,讓人不解的”,往往指物。

【活學活用】

(1)There was a puzzled look on her face because a puzzling problem puzzled her.

她臉上有迷惑不解的神情,因為有個令人費解的問題使她困惑。

(2)The police are still puzzling (=_____________ a puzzle)about/over how the accident could have happened. 警察們仍然在苦苦思索這起事故是怎么發(fā)生的。

(3)語法填空。

①Why a bird can cause an air disaster is still_____________puzzle to me.

②Hearing the general manager's explanation, he had a ___________(puzzle) expression on his face.

③The reporters as well as some critics remained _____________(puzzle) by the election results.

④When the little girl was asked such a _____________question, she stood there with a __________ look on her face. (puzzle)

(4)一句多譯。

①The sheep farmer _____________the disappearance of some sheep on his farm. (puzzle n.)

②The sheep farmer _____________the disappearance of some sheep on his farm. (puzzled adj.)

那位牧羊的農場主一直對他農場中羊只的丟失感到疑惑不解。

答案：(2)in　(3)①a?、趐uzzled?、踦uzzled ④puzzling; puzzled　(4)①was still in a puzzle about

②was still puzzled by

用puzzle的適當形式填空

①To explain the _____________findings, he offers two theories.

②I _____________that I haven't heard from Liz for so long.

③She listened with a _____________expression on her face.

④No one has yet succeeded in explaining the _____________of how life began.

答案：①puzzling②am puzzled③puzzled④puzzle

8. exist vi. 存在，生存

existence n. 存在

Does life exist on Mars?火星上有生命嗎？

I can hardly exist on the wage I'm getting.我靠自己掙的工資簡直難以糊口。

常用結構：

exist+prep. 存在于某地方

exist on sth. 靠某物生存

【活學活用】

(1)Ever since a long time ago, there have existed different opinions among scientists on how the universe first existed(=came into existence).長期以來,在宇宙的起源這個問題上,科學家們一直存在不同看法。

(2)The two sides have reached a partial agreement, but several differences still exist between them.雙方達成了部分協(xié)議,但他們之間仍存在著一些分歧。

(3)語法填空。

①According to some philosophers, everything in ____________(exist) is reasonable.

②We have no money to buy advanced machines, so we should make better use of the___________ (exist) old ones.

③____________exists a wide range of different opinions among the committee members.

答案：(3)①existence?、趀xisting?、跿here

用exist相關短語的適當形式填空

①This plant only ____________Australia.

②Can you ____________such a low salary?

③I doubt the ____________of alien.

答案：①exists; in②exist on③existence

9.prevent　v.阻止;制止

prevent/stop/keep…from doing sth 阻止……做某事

protect…from 保護……不受……侵襲;擋住;防御

keep…doing sth 使……一直做某事

【活學活用】

(1)The heavy rain didn't prevent/stop/keep us from going to the forest to watch the birds last Sunday.

→The heavy rain didn't prevent/stop us going to the forest to watch the birds last Sunday. (不能用keep)

→We were not prevented/stopped/kept from going to the forest to watch the birds by the heavy rain last Sunday. (不能省略from)大雨沒能阻止我們上周日到森林里觀鳥。

(2)Unless we get more funding, we'll be prevented from finishing our experimental programme.

除非我們得到更多的經費,否則我們將無法完成實驗項目。

(3)Every possible means should be taken to___________. 人們應該采取各種可能的措施來防止這條河流受到污染。

(4)語法填空。

①His heart trouble did not prevent him ___________(go) to class the next day.

②His further consideration of the point _________(prevent) by Richard's coming back to us excitedly.

③He cut off the electricity quickly, ___________(prevent) an accident.

④_____(prevent) himself from crying, he took a step backwards into the hallway and closed the door.

答案：(3)prevent/stop/keep the river from being polluted　(4)①going?、趙as prevented?、踦reventing ④To prevent

重點短語

10. in time意為"及時"時相當于early enough, soon enough;意為"終于，早晚"時相當于sooner or later。

We got to the station just in time to catch the bus.=We got to the station just in time for the bus.

我們到達車站時，剛好趕上了那班汽車。

The doctor came in time to save her life.醫(yī)生及時趕來救了她的命。

You'll succeed in time if you keep on working hard.假若堅持努力下去，你遲早會成功的。

聯(lián)想拓展

be in time for sth./be in time to do sth.對于某事是及時的/及時做某事

ahead of time提前；提早

all the time一直；始終

at one time曾經；一度

at a time一次

at times 有時

at the same time同時；然而；可是

from time to time不時；偶爾

in no time立刻；馬上

take one's time不急，慢慢來

time and time again一次又一次；一再

【活學活用】

(1)We arrived in the summer, just in time to enjoy the midnight sun.我們是夏季到的,正好趕上欣賞子夜太陽。(及時)

(2)He was involved in a murder and in time they would pick him up. 他參與了一起謀殺案,他們遲早會逮捕他的。(遲早)

(3)It sounds as if you are getting treatment, and I hope that some mixture of drugs and cognitive behaviour therapy will help in time.聽起來你好像正在接受治療,我希望藥物加上認知行為療法最終能幫到你。(最終)

(4)用time的相關短語填空。

①If you keep on, you'll succeed ___________.

②The car came to a stop just___________to prevent an accident.

③___________, half the land on the earth's surface was covered by the forest.

④We'll have the leak fixed___________.

答案：(4)①in time?、趇n time　③At one time?、躨n no time

單項填空

—I was disappointed in ___________time when I didn't pass the examinations.

—Don't be so discouraged. You'll be successful in___________time.

A./; / B. a; a C./; a D. a; /

解析:選D。句意為：——我沒通過考試那段時間我很失望?！獎e灰心。你遲早會成功的。第一個空考查的是when 引導的定語從句，表示在某段時間里，故應用in a time。而第二個空表示"遲早"，故用in time。

11. prevent ...from 阻止；制止

The heavy rain prevented us from going there. 這場大雨使我們沒能到那里去。

易混辨析

prevent/stop/keep/protect

prevent, stop, keep與protect四者的常見結構為：

prevent ...(from) doing sth.；stop ...(from) doing sth.；keep ...from doing sth.; 均表示"阻止……做某事"。

上述三個結構中，在主動語態(tài)中stop 與prevent后可省去from，但在被動語態(tài)中不可省略; 而keep ...from ...中的from在任何情況下都不能省略。另外，

protect ...from ...表示"保護……不受……侵襲；阻擋；防御"。from后接能帶來傷害或損害的事物。

This plan will be kept from being carried out. 這個計劃將被阻止實施。

高手過招

單項填空

Some policemen should be sent to ___________them ___________the trees.

A. prevent; to cut down B. stop; cutting down

C. keep; to cut down D. keep; cutting down

解析:選B。句意為：應該派一些警察去阻止他們砍伐樹木。keep/prevent/stop ... from doing sth.阻止……做某事,其中keep ...from doing sth. 中的from不可省略。故選B。

12. break out 突發(fā)；爆發(fā)（無被動語態(tài)）

Trouble may break out at any moment.災難在任何時候都可能突然發(fā)生。

When did the war break out? 戰(zhàn)爭什么時候爆發(fā)的？

It was at midnight that a fire broke out.在午夜時分發(fā)生了一起大火。

聯(lián)想拓展

break away from 脫離（政黨等）；打破（陳規(guī)等）

break down 出故障；（計劃等）失?。唬ㄉ眢w、精神等）垮掉

break in 破門而入，闖入；打斷（話語）等

break into 破門而入；突然……起來

break off 折斷；突然中止；斷絕；結束

break through 突破

break up 敲碎；放假；散會

易混辨析

come about/happen/take place/break out/occur

come about 發(fā)生，相當于happen, take place。后面不可以接賓語，也不可以使用被動語態(tài)。

happen 強調偶然發(fā)生。

take place 指按計劃、安排發(fā)生；舉行

break out 多用于指戰(zhàn)爭、火災、疾病、疫情的突然爆發(fā)。

occur 常用于句式： sth. occurs to sb. 某事發(fā)生在某人身上。

【活學活用】

(1)A fire broke out in the lower story during the midnight and soon the whole building was in flames.午夜時分樓下著火了,不一會兒整棟大樓都燒起來了。

(2)Once they understood the joke, they broke out into laughter.他們一明白了那個笑話,就大笑起來。(break out into突然發(fā)出,迸發(fā)出)

(3)The prisoner managed to break out of the room where he was imprisoned.那個犯人設法從囚禁他的屋子里逃了出來。(break out of逃出)

(4)用適當的介詞、副詞填空。

①We were discussing our plans, but had to break ___________when the telephone rang.

②Last night somebody broke___________Mr White's house and took away a lot of things.

③She broke ___________when she heard the news, but quickly recovered.

④Scientists think they have broken _____in their attempt to find the causes of many major diseases.

⑤The husband and wife are always quarrelling and their relations are breaking___________ .

答案：(4)①off?、趇nto?、踕own?、躷hrough?、輚p

用break相關短語的適當形式填空 （原創(chuàng)）

①A terrible tsunami ___________in the southeastern countries of Asia at Christmas, 2004.

②When do you ___________for Christmas?

③Negotiations between the two sides have ___________.

④His house was ___________last week.

答案：①broke out②break up③broken down④broken into

13. block out 擋?。ü饩€）

That wall blocks out all the light.那堵墻把光線都遮住了。

聯(lián)想拓展

burst out 大聲喊叫;突然……起來

go out 外出；過時；熄(燈)

put out 關(燈)；撲滅；生產

come out 出現，顯露；出版;結果是

help out 幫助解決難題(或擺脫困境)

look out留神；注意

watch out 注意；提防；向外看

find out 找出，查明，發(fā)現

pick out挑出;辨認出，分辨出

speak out 大聲地說;大膽地說

think out仔細思考(某事)；想出（主意等）

hang out 掛出;閑逛

knock out (拳)擊中，擊倒，打昏

sell out 售完(某種貨物)，脫銷

turn out 結果證明是

run out (of) 用完，耗盡

check out 結賬離去，辦妥手續(xù)離去

give out 分發(fā)（試卷等）；發(fā)出（光、熱等）；用盡；耗完；筋疲力盡

高手過招

用out相關短語的適當形式填空（原創(chuàng)）

①At the end of the race his legs ___________and he collapsed on the ground.

②It' s easy to ___________him ___________in a crowd because he is very tall.

③His new book will ___________next month.

④We thought it was going to rain; it ___________to be a fine day.

⑤We ___________of/from our hotel at 5 a.m. to catch a 7 a.m. flight.

答案：①gave out②pick; out③come out ④turned out⑤checked out

14.watch out for　密切注視;當心;提防

watch over　照看;看守

keep a watch on 監(jiān)視,密切注視

be on the watch (for) 提防,警惕,當心

【活學活用】

(1)You'll catch a cold if you don't watch out; you need a warmer coat.如果你不注意,就會感冒,你需要穿一件厚一點的外套。

(2)Watch out that you don't catch a cold, going out in the pouring rain.冒著瓢潑大雨出去,當心感冒。

(3)He climbed the mountain carefully, all the time watching out for loose rocks.爬山時,他步步小心,怕踩到松動的石頭。

(4)用適當的介詞填空。

①Will you watch ___________my clothes while I have a swim?

②The police warned holidaymakers to be___________the watch for car thieves.

③Please keep a close watch ___________the children while they are in the pool.

④I'm always watching out ___________mistakes that I may have missed before.

答案：(4)①over　②on　③on　④for

15.cheer up　感到高興;感到振奮

(1)cheer for 　　為……喝彩叫好;為……鼓勁加油

cheer sb on (比賽中)以喝彩聲鼓勵某人;為某人加油

cheer the victory 為勝利而歡呼

(2)cheerful adj. 快樂的,高興的

Cheers! (用于祝酒)干杯!

【活學活用】

(1)Whenever I encounter difficulties, she will encourage me and help me cheer up.每當我遇到困難時,她總是鼓勵我,幫我振作起來。

(2)The trapped miners cheered up when they heard the rescue party.被困的礦工們聽到救援隊的聲音時大為鼓舞。

(3)If they win the final tonight,the team are going to tour around the city 　　　　　　　　by their enthusiastic supporters. 如果他們贏得今晚的決賽,這支隊伍將巡游全城以接受他們熱情的支持者們的歡呼。

(4)語法填空。

①Your___________(cheer) appearance has relieved me of all my worries.

②Everyone cheered___________the violinist at our school concert.

③The crowd cheered the runners ___________as they started on the last lap of the race.

答案：(3)to be cheered　(4)①cheerful　②for?、踥n

16.in one's turn　輪到某人;接著

in turn 　依次;輪流;轉而;相應地

by turns 輪流;交替地

take turns to do sth 輪流做某事

It is one's turn to do sth. 輪到某人做某事。

It turns/turned out that… 結果是……

【活學活用】

(1)Mr Franklin seemed to be as helpless as his cousin when he heard the news in his turn.當富蘭克林先生聽到這個消息時,他也像他的表哥一樣一籌莫展。

(2)It was my turn to recite. How I wish I had been able to say the rules without a mistake!輪到我背誦了,我多么希望我能夠一字不錯地把那些規(guī)則說出來啊!

(3)　__________the person seated next to me on the train was one of my old friends. 火車上坐在我旁邊的那個人原來是我的一個老朋友。

(4)用take turns/by turns/in turn的適當形式填空。

①The young parents had to　__________ to look after their sick baby.

②The change of the climate makes the earth warmer. __________, the warmth of the earth changes the climate, too.

③I decided to divide this class into three groups to give them lessons__________ .

答案：(3)It turned out that　(4)①take turns　②In turn　 ③by turns

17.What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.隨后它會變成什么沒人能知道，直到38~45 億年前，這團塵埃才慢慢地形成一個固體的球狀物。

What it was to become ...是what 引導的主語從句，what 在從句中作become 的賓語。

What surprised everybody was that he didn't come to the meeting.使大家驚奇的是他竟沒有參加會議。

What he did added to our difficulty.他所做的增加了我們的困難。

"be+動詞不定式"在本句中表示按照計劃、安排將要發(fā)生的動作。

When are they to hand in their plan?他們的計劃什么時候交上來？

You are to do your homework before you watch TV.你得做完了作業(yè)才能看電視。

聯(lián)想拓展

"be+to"還可以表示以下含義：

表示可能性，相當于can,主要用于疑問句和否定句。表示命令，意為"必須，不得不"，意思等同于must, have to，表示假設。表示"命運注定……"，通常用于過去時。

How am I to know what has become of him?我怎么知道他的遭遇如何呢？

Certain skills must be learned if one is to use English well.如果想要用好英語，某些技巧是必須學的。

He was never to see his wife again.他注定再也見不到他妻子了。

Were we to offer you more money, would you stay?如果我們給你加錢，你愿意留下嗎？

單項填空

In dry weather the flowers will have to be watered if they___________ .

A. have survived B. are to survive C. would survive D. will survive

解析:選B?？疾檎鎸崡l件句。are to survive在此處并不表示將來，而表示"期望"。

18. But when I tried to step forward, I found I was carried twice as far as on the earth and fell over.而當我試著向前邁步的時候，我發(fā)覺我被送出去很遠，步子的跨度竟是地球上的兩倍，因而我摔倒了。

twice as ...as ... 是……的兩倍

聯(lián)想拓展

英語中的倍數表達法：

倍數+as +adj./adv.+as 是……的幾倍

倍數+adj./adv.的比較級+ than 比……(多/大)幾倍

倍數+ the +表示長度/高度/寬度等的名詞+ of是……長度/高度/寬度的幾倍，此結構中常用的名詞有：size, height, weight, length, width, depth等。

This ruler is three times as long as that one.

=This ruler is twice longer than that one.

=This ruler is three times the length of that one. 這把尺子是那把的三倍長。

There are four times as many students as we expected. 到的學生是我們預計的五倍。

【活學活用】

(1)The new stadium being built for the next Asian Games will be

=three times as big as the present one.

=three times bigger than the present one.

=three times the size of the present one.

正在為下屆亞運會而建設的新體育場將是目前這個體育場的三倍。

(2)The gravity on the surface of Mars is about ___________ as it is on the earth. (strong)

火星表面的引力大約是地球表面引力的三分之一。

(3)Kenya, a land more than ___________ Britain, is everywhere parched. (size)

肯尼亞四處干旱炎熱,其面積是英國的兩倍多。

(4)It is reported that the United States uses ___________ the whole of Europe.(much; as)

據報道,美國使用的能源是整個歐洲的兩倍。

答案:(2)one third as strong　(3)twice the size of　(4)twice as much energy as

(1)翻譯句子

這個房子是那個的三倍大。

(2)完成句子

到的客人是我們預計的兩倍。

There are ___________we expected .

答案：(1)This house is three times as big as that one./This house is twice bigger than that one./This house is three times the size of that one.

(2)twice as many guests as

19.This produced a chain reaction, which made it possible for life to develop.這引起了連鎖反應,使生命的發(fā)展成為可能。

句型公式　make it possible…使……成為可能

【句式點撥】本句是“make it+形容詞/名詞+to do sth”結構,其中it為形式賓語,指代后面的不定式結構。it作形式賓語,除指代不定式結構外,還可指代that引導的賓語從句。

【活學活用】

(1)The sun gives off light and heat, which makes it possible/making it possible for plants to grow.

太陽發(fā)出光和熱,這使得植物生長成為可能。(it指代不定式)

(2)The invention of television has made it possible that movies can be watched at home.

電視機的發(fā)明使在家看電影成為可能。(it指代從句)

(3)People in the West make________a rule to buy Christmas presents for their relatives and friends.

在西方,人們常在圣誕節(jié)時給他們的親屬們和朋友們購買禮物。

(4)Obviously, it is the Internet___________to communicate with each other.

顯然,是因特網使得彼此間交流很容易。

(5)They are scheduled to reach Shanghai by June 6, ___________for them to attend the meeting.

他們預計于6月6日前抵達上海,正好能使他們趕上參加會議。

答案:(3)it　(4)that makes it easy　(5)making it possible

佳句再現

1.so+adj./adv.…that…引導狀語從句,意為“如此……以至于”

The earth became _________(如此激烈以至于) it was not clear whether the shape would last or not.

2.make it possible to do sth使做某事成為可能

This produced a chain reaction, which ___________(使生命的發(fā)展成為可能).

3.現在分詞表示“結果”

As a result of this event, a great dust cloud formed in the sky ___________(遮住了陽光).

4.whether引導的名詞性從句

So _______(生命能否延續(xù)) on the earth for millions of years to come will depend on ___________(這個問題能否得到解決).

5.“倍數+as+adj./adv.+as”句型

But when I tried to step forward, I found I was carried __________(兩倍遠) on the earth and fell over.

答案:1.so violent that

2. made it possible for life to develop

3.blocking out the sunlight

4.whether life will continue;whether this problem can be solved

5.twice as far as