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必修三 Unit 4 the science of the stars


Unit 4 Astronomy: the science of the stars 单元要点预览 1. loudly / loud / aloud 词 2. unlike / dislike 语 3. remain / leave 辨 4. climate / weather 析 5. now that / since / because / as 1. violent adj

.强暴的, violence n.暴力,强 violently adv. 强 暴 猛烈的 词 本(础)的 n.[pl.]基本 基本地;根本地 汇 原则(法则) 部 词 3. development n.生长, develop vt.发展;产 分 形 变 展;新情况 发 生 vi.生长;发展 的 developing adj. 发 展的 developed adj. 发达 根本 暴;猛烈 地;猛烈地 adv. fundament n. 基础;

2. fundamental adj.基 fundamentally

化 4. lay vt.放下;摆设; 产(蛋)

lie vi. 躺,平放;位 lie n.&vi. 谎话; 说谎 于 lie---lied---lied---lying

lay---laid---laid---layi lie---lay---lain---lying ng 5. prevent vt. 预防,防 prevention n.预防; 止 阻止;妨碍 preventable adj.可防 止的,可预防的

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6. gentle adj.和蔼的; gently adv.温和地; 轻 柔的 静静地

7. physics n.物理,物理 physicist n.物理学家 physical adj.身体的; 学 1. system n.[c] 系统;体系;制度;方法 重 2. lay vt. (laid, laid, laying) 把??放下;摆设;铺(地毯) ;产(蛋) 点 3. harmful adj. 有害的;伤害的 单 词 4. exist vi. 存在;生存 5. puzzle v.(使)迷惑;(使)苦思 n.谜;难题 6. pull v.拉,拖,拔;移动 n.拉,拖;拉(引)力 7. cheer vt.&vi. (使)高兴、振奋;(对)欢呼 1. to begin with 以??开始;由??作为开头;首先 2. in time 及时;最终;迟早 重 3. in one’ s turn 轮到某人;接着 点 4. prevent...from 使??不做事;阻止??做某事 词 5. block out 挡住(光线) 组 6. be off = set off 出发;动身;不用上班/学/开张 7. break out (灾难、战争等)突发;爆发 8. watch out 密切注视;当心;提防 1. It exploded loudly with fire and rock, which were in time to 重点句 produce the water vapour, carbon dioxide, oxygen, nitrogen and 子 other gases, which were to make the earth’ s atmosphere. 物理(学)的;物质的

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2. That made it possible for life to begin to develop. 3. But when I tried to step forward I found I was carried twice as far as on the earth and fell over. 重点语 宾语从句和表语从句(见语法部分) 法 语言要点 Ⅰ.词语辨析 1. loudly / loud / aloud 【解释】 loudly adv 响亮地,高声地 loud adj/adv 与 sing, speak, talk 连用 aloud adv 相对默读而言;出声 【练习】根据句子的意思在括号里填入适当的词。 1). Will you please speak ______? 2). It is good for you to read English ______ every morning. 3). The bomb exploded ______. 4). Is her voice ______ enough ? 5). Action speaks ______ than words (事实胜于雄辩). Keys: 1). louder louder 2. unlike / dislike 2). aloud 3). loudly 4). loud 5).

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【解释】 unlike prep. 不像,和??不同 dislike vt./n. 不喜爱,厌恶 【练习】根据句子的意思在括号里填入适当的词。 1). A good hotel manager should know his regular guests’ likes and ______. 2). Her latest novel is quite ______ her earlier work. 3). If you go on like that you’ ll get yourself _______ (like). 4). I was very interested in the lecture, ______ many of the students. Keys: 1). dislikes 3. remain/leave 【解释】 remain vi. 仍然是;留下;剩下 常用句型:remain + n. 仍然是 remain + adj./adv./prep. 仍然是 remain + v-ed/v-ing 仍然是 remain to be done 有待去做,依然要做 leave vt. 剩下,忽略或未拿或未带(某物) ,使或让(某人、事物) 处某状态﹑某地等 常用句型:leave sb. sth. / leave sth. to sb. 给某人留下某物 leave sth (for sb) 留下,交待下(某物) leave sth to sb 将某物遗赠给某人
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adj. [作表语] 不相似;不同

2). unlike

3). disliked

4). unlike

remaining/left 两者都可以作形容词,表示“剩下的” ,前者用于被 修饰的名词之前,后者用于被修饰的名词之后。

【练习】根据句子的意思在括号里填入适当的词。 1). Someone ______ you this note while you were out. 2). After the earthquake, little ______ of the village. 3). He used the ______ money to buy a dictionary. 4). After buying the dictionary, he had not much money______. 5). Arriving home, I found that I’ d ______ my key in the office. 6). Don’ t leave her ______ (wait) outside in the rain. 7). She remained _______ (change) after all these years. 8). A great many things remain _______ (do). Keys: 1). left 5). left done 4. climate / weather 【解释】 climate 指从长时间的范围来看某地的平均气候或经常性的气候; weather 指某地一时的天气,如寒暖、晴雨和干湿的变化情况。 2). remained 6). waiting 3). remaining 7). unchanged 4). left 8). to be

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【练习】根据句子的意思在括号里填入适当的词。 1). We shall go out for a picnic tomorrow if the _______ is fine. 2). A drier _______ would be good for your health. 3). I couldn’t imagine what it would be like to live in a hot ________. 4). The _______ of our country is mild, but individual places experience bad ________. Keys: 1). weather weather 5. now that / since / because / as 【解释】 都可引导原因状语从句,语气最强的是 because,引导直接而明确 的原因, 也用来回答 why 的问句或用于强调句型; 其次是 since/now that,表示已知或明显的原因,再次是 as,引导的原因是不言而喻、 显而易见的;for 引导的是并列分句,表推测或判断的原因,前面 有逗号隔开。 【练习】根据句子的意思在括号里填入适当的词。 1). _______ everybody is here, let’s begin our meeting. 2) It was _______ he was ill that he didn’ t go to school. 3). It must have rained last night, _______ the ground is all wet. 4). _______ we are alone, we can speak freely. Keys: 1). since/now that 2). because
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2). climate

3). climate

4). climate;

3). for

4). Now (that)

Ⅱ.词性变化(见上面表格) Ⅲ.重点词汇 1. system n.[c] 系统;体系;制度;方法 有条理的 [典例] 1). The solar system includes the sun and its eight planets. 太阳系包 括太阳和它的八颗行星。 2). Alcohol is bad for your system. 喝酒对身体有害。 [练习] 根据句子的意思完成句子。 1). The ______ ______ (教育系统) operates very differently in the US and China. 2). He introduced us a well-designed ______ ______ (铁路系统). Keys: 1). educational system 2). railway system systematic adj 有系统的;

2. lay vt. (laid, laid, laying) 把放下;摆设;铺(地毯) ;产(蛋) [典例] 1). He laid his hand on my shoulder. 他把手放在我的肩上。 2). Who should we lay the blame on? 我们该责备谁? [重点用法] lay 短语: lay eggs 下蛋 lay sth. aside 把某物放在一边;积蓄(钱)
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lay sth. down 把某物放下 lay the table 摆桌子

lay the blame on sb.责备某人

lay emphasis / stress on sth. 把重点放在某事上 [练习] 根据句子的意思在括号里填入适当的词或翻译。 1). The bird ______ its eggs in other birds’ nests. 2). He is a political leader that _____ _____ _____ _____ (非常强调) individual responsibility. 3). He ______ some money ______ for rainy days. Keys: 1). lays 2). lays great stress on 3). lays/puts; aside

3. harmful adj. 有害的;伤害的 [典例]

harm n.&vt. 伤害(某人)

Many people are aware of the harmful effects of smoking. 很多人都 意识到吸烟的危害。 [重点用法] be harmful to sb./sth. 对??有害 do harm to sb.= do sb. harm = harm sb. 对??有害;伤害?? [练习] 根据句子的意思在括号里填入适当的词或翻译。 1). Everyone knows that smoking is ______ to your health. 2). In many cases, too much care for children from parents might even do ______ to their growth. 3). 在阳光下看书对你的眼睛伤害很大。
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___________________________________________________________ ____________________ Keys: 1). harmful 2). harm 3). Reading in the sun does a lot of

harm to your eyes. = Reading in the sun does your eyes a lot of harm.= Reading in the sun is very harmful to your eyes.

4. exist vi. 存在;生存 [典例]

existence n. 存在

1). Does life exist on Mars? 火星上有生命吗? 2). I can hardly exist on the wage I’ m getting. 我靠我挣的工资简直 难以餬口。 [重点用法] exist + prep. 存在于地方 exist on sth. 靠某物生存

[练习] 用 exist 的短语或其适当形式填空。 1). This plant ______ only ______ Australia. 2). Can you ______ ______ such a low salary? 3). I doubt the ______ (exist) of alien. Keys: 1). exists; in 2). exist on to 3). existence

5. puzzle vt.&vi. (使)迷惑;(使)苦思 n.谜;难题 了解的;困惑的 [典例] 1). Her reply puzzled me. 她的回答把我弄糊涂了。
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puzzled adj.无法

puzzling adj.令人费解的

2). Their reason for doing it is still a puzzle to me. 他们为什麽要做此 事我仍莫名其妙。 [重点用法] sth. puzzles sb. 某事使某人迷惑/为难 sb. be puzzled by sth. 某人对??感到迷惑 puzzle about/over sth. 对某事感到迷惑或苦苦思索(以便理解) puzzle one’ s brain 苦思苦想;绞尽脑汁 solve a puzzle 解决一个难题 [练习] 用 puzzle 的适当形式填空或翻译。 1). To explain the ________ (puzzle) findings, he offers two theories. 2). I _______ (puzzle) that I haven’ t heard from Liz for so long. 3). She listened with a _______ (puzzle) expression on her face. 4). No one has yet succeeded in explaining the _______ (puzzle) of how life began. 5). He _______ (puzzle) what to do next. 6). _______ _______ _______ (使我困惑的事情) is why he left the country without telling anyone. Keys: 1). puzzling 5) was puzzled 2). am puzzled 6). What puzzles me 3). puzzled 4). puzzle

6. pull v.拉,拖,拔;移动 n.拉,拖;拉(引)力 [典例]
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1). You push and I’ ll pull. 你来推,我来拉。 2). I felt a pull at my sleeve and turned round. 我觉得有人扯我的袖 子,便转过身来。 [重点用法] pull ahead (of sb/sth) 领先(於某人/物) pull (sb) back(使某人)退却;撤回(某人) pull off (sth)(指机动车辆)驶离(道路) (至路侧停车处停下) pull out (sth.) 拉掉;使分离;掏出;驶离(车站) pull on 穿,戴上(袜子、手套等) pull together 同心协力;通力合作 [练习] 用 pull 短语的适当形式填空。 1). I arrived as the last train was ______ ______. 2). He ______ ______ a gun and aimed at the criminal. 3). So long as we ______ ______, there’ s no mountain top we can’t conquer. Keys: 1). pulling out 2). pulled out 3). pull together

7. cheer vt. & vi. (使)高兴、振奋;(对)欢呼 cheerless adj.不高兴的 [典例]

cheerful adj.高兴的

1). The crowd cheered loudly as the Queen appeared. 女王出现时群 众高声欢呼。
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2). He was greatly cheered by the news. 他听到这个消息非常高兴。 [重点用法] cheer sb. on 为某人加油 cheer (sb) up(使某人)更高兴或更快活

[练习] 用 cheer 的短语或其适当形式填空。 1). Your visit has greatly ______ him up. 2). The crowd ______ the runners ______ as they started the last lap. 3). You look as though you need ______ up. Keys: 1). cheered 2). cheered; on 3). cheering

Ⅳ.重点词组 1. to begin with = to start with 以??开始;由??作为开头;首先 [典例] To begin/start with, I couldn’ t understand a single word. 起初,我一 句也没弄明白。 [重点用法] begin/start with 从??开始 begin/start sth with 从??开始?? [练习] 根据句子的意思完成句子。 1). He ______ his speech ______ a poem. 2). His speech ______ ______ a poem. 3). ______ ______ ______, pets are good friends of many lonely people, especially the old.
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Keys: 1). began/started; with start/begin with

2). began/started with

3). To

2. in time 及时;最终;迟早 [典例] 1). They caught the bus in time. 他们及时赶上了汽车。 2). If you keep on, you will succeed in time. 如果坚持下去,你们总有 一天会成功的。 [短语归纳] time 短语: in time for sth./ to do sth. 及时;不迟 in no time 立刻;马上 at one time 有个时期;曾经;一度 at a time 一次;每次 all the time 一直;始终;老是 by the time 到??的时候为止 for the time being 暂时;暂且 take one’ s time 不着急;慢慢来 kill time 消磨时间 from time to time 不时地,间或 many a time 常常;多次 once upon a time 从前 at times = sometimes 有时 on time 按时;准时 at no time 永不??

at the same time 同时;尽管如此 ahead of time 提前,提早 race against time 争分夺秒 keep bad time(钟、表)走得不准 time and again 一次又一次;重复地 keep time (钟表)走得准
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have a good/nice/hard time (in) doing sth 做某事很?? It’ s (high/about/very) time that sb. did/ should do sth. 是做某事的时 候了 [练习] 用 time 短语填空。 1). They sent the mail to me just _______ _______, before I 1eft. 2). William arrived at the theatre just _______ _______ for the play was to be on. 3). Hurry up! The concert will begin _______ _______ _______. 4). _______ _______ _______ will I give up. 5). The boy laughed and cried _______ _______ ______ ______. 6). _______ _______ _______ he was addicted to playing web games, but now he devotes himself to writing, which delights his parents. 7). Don’t try to do everything at once; take it a bit _______ _______ _______. 8). You’ll have your own office soon, but _______ _______ _______ _______ you’ ll have to share one with me. Keys: 1). in time 4). At no time 5). at the same time 8). for the time being 6). At one time 7). at a time 2). in time 3). in no time

3. in one’ s turn 轮到某人;接着

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[典例] I will see you, each in your turn. 我将要一个接着一个地看你。 [短语归纳] turn 短语: in turn 轮流;一个接着一个 by turns 轮流;一阵??一阵?? take turns (to do sth.)轮流(做某物) It’s one’s turn to do sth. 轮到某人做某事了 [练习] 用 turn 短语填空或翻译句子。 1). She went hot and cold _______ _______. 2). 我们轮流着开车。 ___________________________________________________________ _________________________ 3). 今天轮到谁发言了? ___________________________________________________________ _________________________ Keys: 1). by turns 2). We drove the car by turns / in turn. = We

took turns to drive the car. 3). Whose turn is it to give a speech today?

4. prevent...from = stop...from = keep....from 使??不做事;阻 止??做某事 [典例] His back injury may prevent him from playing in tomorrow’ s game. 他背部的伤可能使他参加
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不了明天的比赛。 【用法辨析】注意: prevent / stop sb. from doing sth.中的 from 可省, keep sb. from doing sth.中 from 不可省略,因为 keep sb. doing sth.是“使某人一直做某事”之 意;但如在被动语态中, 三者的 from 都不可省;当后接 sb’ s doing sth. 作宾语时,只能用 prevent 或 stop,不能用 keep, 因为没有 keep sb’ s doing sth. 的句型。 [练习] 根据句子的意思完成句子或翻译。 1). Doctors took action to _______ _______ _______ _______ _______ (防止这种疾病的蔓延). 2). Of course I can’ t _______ your going abroad. 3). 警察阻止他们携带武器。 ___________________________________________________________ ____________________________ Keys: 1). prevent/stop/keep the disease from spreading prevent / stop 3). The police prevented/stopped/kept them from carrying weapons. = They were prevented/stopped/kept from carrying weapons. 2).

5. block out 挡住(光线) [典例]
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That wall blocks out all the light. 那堵墙把光线都遮住了。 [短语归纳] out 短语: break out 爆发,发生 go out 外出;过时;(灯)熄 burst out 大声喊叫,突然…起来 help out 帮助解决难题(或摆脱困境)

put out 关(灯);扑灭;生产 come out 出现,显露;出版,结果是 look out 留神;注意 find out 找出,查明,发现 think out 仔细思考某事;想出(主意等) pick out 挑出,辨认出,分辨出 speak out 大声地说,大胆地说 hang out 挂出,闲逛 knocked out (拳击中)击倒,打昏 watch out 注意;提防

sell out 售完(某种货物),脱销 turn out 结果证明是 run out (of) 用完,耗尽 hand out 分发,散发 give out 分发;用完,消耗尽;发出(光、声音等) [练习] 用 out 短语填空。 1). At the end of the race his legs _______ _______ and he collapsed on the ground. 2). It’ s easy to _______ him _______ in a crowd because he is very tall. 3). His nwe book will _______ _______ next month. 4). We thought it was going to rain; it _______ _______ to be a find day.
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check out 结帐离去,办妥手续离去

5). We _______ _______ of/from our hotel at 5 a.m. to catch a 7 a.m. flight. Keys: 1). gave out 5). checked out 2). pick; out 3). come out 4). turned out

6. be off = set off 出发;动身;不用上班/学/开张 [典例] Then we were off. 随后我们就启程了。 [短语归纳] off 短语: get off 下车 fall off 从??摔下来 take off 脱下;起飞

keep off 远离 turn off 关闭 set...off 给??送行 give off 散发

pay off 付清,还清

kick off 踢球 jump off 跳下 show off 炫耀 shut off 关闭

[练习] 用 turn 短语填空或翻译。 1). It is a Sunday and we _______ _______ (不用上班) today. 2). Her husband _______ _______ on a business trip somewhere. 3). There we saw a sign reading, “_______ _______ the grass”. 4). After ten years of hard work, she finally _______ _______ all her debts. Keys: 1). are off 2). was off 3). Keep off 4). paid off

7. break out (灾难、战争等) 突发;爆发
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[典例] Fire broke out during the night. 夜间突然发生了火灾。 [短语归纳] break 短语: break away from 脱离(党派) ;摆脱(控制) break down 毁掉;坏掉;(计划/谈判)失败 break up 打碎;拆散;(会议)结束;分裂(解体) break off (使)停止;中断;折断 break into sth. 强行进入某处 break one’ s word/promise 食言;说话不算数 [练习] 用 break 短语填空。 1). A terrible tsunami _______ _______ in the southeastern countries of Asia at Christmas, 2004. 2). When do you _______ _______ for Christmas? 3). Negotiations between the two sides have _______ _______. 4). His house was _______ _______ last week. Keys: 1). broke out broken into 2). break up 3). broken down 4).

8. watch out 密切注视;当心;提防 [典例] Watch out! There’ s a car coming. 小心! 汽车来了。 [重点用法]
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watch out for sb/sth 警惕或注意某人/事物 watch over 保护;照看 [练习] 用 watch 短语填空。 1). There must have been an angel _______ _______ me that day. 2). What problems should I _______ _______ _______ when buying an old house? 3). You’ ll become an alcoholic if you don’ t _______ _______. Keys: 1). watching over 2). watch out for 3). watch out

Ⅴ.重点句子 1. It exploded loudly with fire and rock, which were in time to produce the water vapour, carbon dioxide, oxygen, nitrogen and other gases, which were to make the earth’ s atmosphere. 它(地球)巨 大的爆炸喷出了烈火与岩石。最终产生了水蒸气、二氧化碳、氧、氮 和其他多种气体,从而形成了地球的大气层。 [解释]“be + 不定式”结构通常用来表示“按计划或安排将要做的事 情” ,或表示上级对下级、父母对子女下命令, “应该做某事”或表示 某事“将必然发生” 。例如: 1). Here is a message for you from your head teacher: you are to go to her office after class. 你的班主任给你一个口信, 要你下课后到她 的办公室去。 2). The worst is still to come. 更糟糕的事情还会发生。
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3). We’ ll hold a meeting tomorrow. = We are to hold a meeting tomorrow. = A meeting is to be held tomorrow. 我们明天将开会。 4). The train is to arrive in Beijing at 10: 25 am. 这趟火车将于上午 10: 25 到达北京。 [练习] 完成句子或翻译。 1). Here is a message for you from your head teacher: you ______ ______ ______ to her office after class. (你的班主任给你一个口 信,要你下课后到她的办公室去。) 2). The worst is still ______ ______ (come). 3). We’ ll hold a meeting tomorrow. = We ______ ______ ______ a meeting tomorrow. = A meeting is ______ ______ ______ tomorrow. 4). 这趟火车将于上午 10:25 到达北京。 ___________________________________________________________ _____________________________ Keys: 1). are to go 2). to come 3). are to hold; to be held

4). The train is to arrive in Beijing at 10: 25 am.

2. That made it possible for life to begin to develop. 那使生命的生长 发育成为一种可能。 [解释] 此句中的 made 后跟带形式宾语 it 的复合结构,其中 it 是形 式宾语,真正宾语是不定式复合结构, “for live to begin to develop” , 宾语补足语是 possible。再如:She made it her business to find out

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who was responsible. 她非要弄清楚是谁的责任不可。 提示:常用于此结构的动词还有 think,feel,find,consider 等。例 如: 1). We make it a rule to get up at 6 o’ clock every morning. 2). I find it hard to get along with him. 3). He found it impossible to leave Germany for the USA. 他发现不 可能离开德国去美国了。 4). I think/find/feel/consider it my duty to help you.我觉得我有责任 帮助你。 [练习] 完成句子或翻译。 1). We ______ ______ ______ ______ (规定) to get up at 6 o’ clock every morning. 2). I ______ ______ ______ (发现很难) to get along with him. 3). 他发现不可能离开德国去美国了。 ___________________________________________________________ _________________________________ 4). 我觉得我有责任帮助你。 ___________________________________________________________ _________________________________ Keys: 1). make it a rule 2). find it hard 3). He found it 4). I

impossible to leave Germany for the USA. think/find/feel/consider it my duty to help you.

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3. But when I tried to step forward I found I was carried twice as far as on the earth and fell over.而当我试着向前迈步的时候, 我发觉我 被送出去很远,步子的跨度竟是地球上的两倍,因而我摔倒了。 [解释] twice as...as... “是??的两倍” ,英语常见倍数的表示句型: 1). 倍数+ as + adj./adv. + as “是??的几倍” My room is twice as large as his. 2). 倍数+ adj./adv.比较级+ than “比??(多/大)几倍”My room is twice larger than his. 3). 倍数+ the +表示长度/高度/宽度等的名词+ of “是??的长度/高 度/宽度几倍” My room is twice the size of his. 注意:此结构中常用的名词有:size, height, weight, length, width depth 等。例如: 1). This ruler is three times as long as that one. = This ruler is three times longer than that one. = This ruler is three times the length of that one. 这把尺子是那把 的三倍那么长。 2). There are four times as many students as we expected. 到的学生 是我们预计的五倍。 [解释] twice as ... as... 是的两倍,英语常见倍数的表示句型: 1). 倍数 + as + adj./adv. + as “是??的几倍” My room is twice as large as his. 2). 倍数 + adj./adv.比较级 + than “比??(多/大)几倍” room is My twice larger than his.
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3). 倍数+ the +表示长度/高度/宽度等的名词+ of “是??的长度/高 度/宽度几倍” My room is twice the size of his. 注意:此结构中常用的名词有:size, height, weight, length, width depth 等。 [练习] 完成句子或翻译。 1). 这把尺子是那把的三倍那么长。 ___________________________________________________________ _______________________________ 2). 到的学生是我们预计的五倍。There are ______ ______ ______ ______ ______ ______ we expected. Keys: 1). This ruler is three times as long as that one. = This ruler is three times longer than that one. = This ruler is three times the length of that one. four times as many students as Ⅲ.课文佳句背诵与仿写) 1【原句】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. [模仿要点] 句子结构: what+主语从句+is … till +时间名词+定 语从句 【模仿 1】他要给我什么礼物一直不知,直到昨天下文他来看我是我 才知道。 ___________________________________________________________ _______________________答案:What gift he would give me was 2).

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uncertain until yesterday afternoon when he came to see us. 【模仿 2】没人知道我们将要得到什么样的工作,直到 3 年后我们从 大学毕业以后才知道。 ___________________________________________________________ _______________________ 答案:What jobs we will get is unknown until 3 years later when we will graduate from university.

2【原句】What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. [模仿要点] 句子结构: 主语从句+ is + that 表语从句 【模仿 1】他想告诉我们的是一天下文当他在回家的路上看见一只小 鸟受伤了。 ___________________________________________________________ _______________________ 答案:What he wanted to tell us is that one afternoon when he was on his way home he saw a bird which was dying. 【模仿 2】他缺席的原因是他在上学时被一辆小车撞伤了。 ___________________________________________________________ _______________________ 答案:Why he was absent is that he was badly hurt by a car when he
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went to school.

3【原句】They multiplied and filled the oceans and seas with oxygen, which encouraged the later development of early shellfish and all sorts of fish. [模仿要点] 句子结构:which 引导一个定语从句对上句情况的进一 步说明。 【模仿 1】我们常常看到有人乱丢乱吐,这弄得我们的环境很脏 ___________________________________________________________ _______________________ 答案:We often see some people throw rubbish and spit everywhere, which makes our environment dirty. 【模仿 2】她的父母非常感激我们,医生也高度评价了我们的急救, 这使得我们意识到学习急救的必要性。 ___________________________________________________________ _______________________ 答案:Her parents were very thankful to us and the doctors thought highly of our first aid, which made us realize the necessity of learning first aid.

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