新教材2023版高中英语Unit3ConservationPartⅠTopicTalk学案北师大版选择性必修第一册

Unit 3　Conservation

PartⅠ　Topic Talk

【学习目标】

单词巧练　写准记牢

Ⅰ.核心单词练习：请根据所给的词性和词义写出单词

1．________________ adj.  紧急的，急迫的

2．________________ adv.  非常地，极端地

3．________________ adj.  灭绝的，绝种的

4．________________ vi. &vt.  猎取，猎杀

5．________________ adv.  非法地，违法地

6．________________ vi. &vt.  转换，改变

7．________________ n.  威胁；(灾难等坏事)发生的可能

8．________________ vi. &vt.  再利用，回收利用

9．________________ n.  一项，一条

10．________________ vt.  破坏；毁掉

11．________________ adj.  塑料制的

12．________________ n.  保护

Ⅱ.常用单词练习：根据句意和所给的首字母或中文提示写出符合句中单词的正确形式

1．The new law would encourage companies ________ (转换) from coal to cleaner fuels.

2．Chimpanzees often ________ (猎食) in large groups, 30 to 50, and move quickly through the forest.

3．A study has found that a language becomes ________ (灭绝的) every two weeks.

4．A ________ (威胁) to a person or thing is a danger that something unpleasant might happen to them.

5．“Can I see you for a moment？”“Is it ________ (紧急的)？”

6．Up to two thirds of 14-to 16-year-olds admit to buying drink ________ (非法地)．

7．The pipes are so light and they should be made of p________.

8．In Australia, agriculture has d________ half of all woodland and forests.

9．More funds should be devoted to the c________ of freshwater resources and endangered species.

10．An i________ is one of a list of things for someone to do, deal with, or talk about.

11．If you r________ things that have already been used, such as bottles or sheets of paper, you process them so that they can be used again.

Ⅲ.阅读本部分内容，翻译相关短语

1．目前，现在  ________________

2．在危险中  ________________

3．过着……的生活  ________________

4．尽自己的职责  ________________

5．起某种作用  ________________

6．对……热情  ________________

7．削减，减少  ________________

►第一版块：重点单词

1．threat n．[C]构成威胁的人，形成威胁的事物；(灾难等坏事)发生的可能；[C，U]威胁，恐吓

(教材P108)After the lecture, I can see that the use of oil and coal is one of the biggest threats to our planet.听完讲座，我明白了，石油和煤炭的使用是我们星球的最大威胁之一。

pose a threat to...  对……构成威胁

under threat  受到威胁

❶Drunken drivers pose a serious threat to other passers-by.

醉驾者对其他路人构成了严重的威胁。

❷These ancient woodlands are under threat from new road developments.

新道路开发可能对这些古老的林地造成破坏。

❸Her parents made threats to take away her mobile phone if her grades couldn't be improved.

她父母威胁说，如果她不能提高成绩，就要拿走她的手机。

联想串记：

[即学即练]　单句语法填空

①Wildlife has been greatly ________ (threat) in the modern age.

②Floating ice around Iceland was becoming a threat ________ navigation.

③Some cultures see direct eye contact as impolite  or ________ (threaten) behavior, while Americans see it as a sign of honesty.

④Bats are ________ threat in many areas of the world. The number of them has gone down to such a level that the remaining members may not be enough to keep the species.

2.switch vt.& vi.(使)改变；vt.交换，转换，对调　n．[C](电路的)开关，闸，转换器；改变，转变

(教材P108)We definitely need to switch to different forms of power as soon as possible.我们确实需要尽快转用其他形式的能源。

switch (from A) to B  (由A)转变成B

switch off/on  关/开(电灯、机器等)

switch off   不再关注，不再理睬

switch over  换台，换频道

a light switch  电灯开关

a policy switch  政策的转变

❶She worked as a librarian before switching to journalism.

她在转行从事新闻工作前是图书管理员。

❷Please make sure all mobile phones are switched off during the performance.

请确保演出时关上所有手机。

❸If he gets bored, he just switches off and looks out the window.

他觉得无聊时，就心不在焉地朝窗外看。

❹There is a light switch on the wall.墙上有一个电灯开关。

❺We had to make a switch in our plan.

我们不得不改变我们的计划。

语境串记：

Lucy got home from work early. After changing clothes, she swtched off the light and came to the living room. Then she switched on the TV and switched over to Channel 10.露西早早下班回到家，换完衣服后，她关灯来到客厅。然后她打开电视，转到第10频道。

[即学即练]　单句语法填空/单句写作

①After dinner, we often switch ________ the TV to watch the news, then switch ________ football games. At 10 o'clock we switch ________ the TV and go to bed.

②Not only is biking good exercise, but switching ________ a car to a bike also reduces the amount of pollution in the air.

③我妈妈让我在离开房间前记得关灯。

________________________________________.

3.urgent adj.紧急的，紧迫的，迫切的

(教材P109)That's an incredibly urgent matter...那是一件非常紧急的事……

It is urgent that...   急需……(从句谓语用“should＋动词原形”，should可省略)

urge sb.to do sth.  敦促/力劝某人做某事

urge that...  主张……(从句谓语用“should＋动词原形”，should可省略)

❶The children in that area are in urgent need of food.

那个地区的孩子急需食物。

❷It is urgent that those tents (should) be sent to the disaster area.

那些帐篷急需被送到灾区。

归纳拓展：

(1)urgency n. [U]紧急，迫切

(2)urgent adj. 紧急的，紧迫的，迫切的

(3)urge vt. 竭力主张；催促，力劝

语境串记：

He urged us to collect money for those who were in urgent need of food and clothes.他敦促我们为那些急需食品和衣服的人募捐。

[即学即练]　单句语法填空

①Researchers have found that red can bring a sense of ________ (urge) into our minds.

②It is urgent that we ________ (carry) out the alternative plan.

③Parents should actively urge their children ________ (take) advantage of the opportunity to join sports teams.

4.hunt vi. & vt.打猎；猎杀；搜寻；搜索；追踪；追捕　n．搜寻；寻找；打猎

(教材P109)Yes, many animals are illegally hunted for something they have.是的，许多动物因它们身上的东西而被非法猎杀。

hunt for sth.  搜寻某物

hunt for sb./sth.  搜寻/寻找某人/某物

知识联想：

hunter n. [C]猎人；搜集某种东西的人

❶Lions sometimes hunt alone.狮子有时单独猎食。

❷Whales are still being hunted and killed in the Arctic Ocean.北冰洋的鲸类仍在遭到猎杀。

❸Detectives are busy hunting for clues.侦探们正在忙着寻找线索。

❹I am on the hunt for the perfect summer sandals.我在寻找一双完美的夏日凉鞋。

[即学即练]　单句语法填空

①The kids were ________ (hunt) for shells on the beach while I was reading a newspaper.

②The fox ran away before the ________ (hunt) shot it.

③John set out that day ________ (hunt) for work.

④Police have launched a nationwide hunt ________ the killer.

►第二版块：重点短语

1.cut down (1)削减，缩小(尺寸、数量或数目)。可作及物短语动词和不及物短语动词。

(2)(自根基部分)砍倒。为及物短语动词。

(教材P109)I think we should cut down the use of unrecyclable plastic to protect our planet.我认为我们应该减少使用不可回收利用的塑料来保护我们的星球。

cut...down (to...)  减少……(至……)

cut down on...  减少……

❶We are trying our best to cut down costs and improve quality.我们正在尽力降低成本，提高质量。

❷We need to cut the article down to 1,000 words.我们得把这篇文章压缩到1 000字。

❸Cut down on fatty foods if you want to lose weight.你如果想减肥，就得少吃高脂食物。

❹Deserts are also formed because people cut down trees and dig up grass.人们伐树掘草也会造成土壤沙化。

归纳拓展：

cut in 插嘴

sorry to cut in on you 抱歉打断你的话。

cut out 剪下

cut this article out of the newspaper 从报纸上剪下这篇文章。

cut up 切碎

cut up the meat 把肉切碎。

cut off 停止，中断(供给)

cut off the gas supply 中断供气。

cut off 使……与外界隔绝

feel cut off living in the mountains生活在山区感到闭塞。

[即学即练]　用cut的相关短语完成句子

①The company has ________________ the gas supply temporarily to repair the damaged gas pipe.

②It's rather impolite to ________________ when other people are talking.

③Evidence suggests that they kept the fire burning all winter and used sharpened stone tools to ________________ the meat.

④Experts think the amount of homework for the students should be ________________.

2.in danger意为“处于危险中”。其后接of可构成in danger of...“处于……的危险中”。

(教材P109)He works on protecting animals in danger.他致力于保护濒危动物。

danger n.  [U]危险

in danger  处于危险中

out of danger   脱离危险

dangerous adj.  危险的

endanger vt.  使处于险境，危及

endangered adj.  濒危的

❶Once harm is done to the ecosystem, all species will be in danger, including humans.

一旦生态系统遭到破坏，所有物种，包括人类，都将处于危险之中。

❷What a moving scene to see so many people offer help to those in danger!

看到这么多人帮助那些处于危险中的人，真令人感动！

语境串记：

Last week, John was bitten by a dangerous snake and that endangered his life. John was in great danger. Thanks to the doctor, he received treatment in time and he was out of danger at last.上周约翰被一条危险的蛇咬了，那危及了他的生命。约翰处于极大的危险中。多亏了医生，约翰得到了及时的救治，最后他脱离了危险。

[即学即练]　选词填空：endanger/endangered/dangerous/结合danger的用法完成句子

①We should do what we can to save those ________ species, including tigers which are considered ________ because they can ________ people's lives.

②The old man is still ________________. He is no better than he was yesterday.

③I heard Jack had a car accident and was ________________ losing his life, but luckily, he is ________________ now.

Ⅰ.单词拼写

1．With every person using about 130 kg of plastic every year, there is an u________ need of better ways of processing it.

2．P________ waste is a huge problem in Indonesia, and this has led its city to come up with an approach to encourage residents to recycle it.

3．The river flooded last summer and the bridge was totally ________ (毁掉) in the floods.

4．A statement from the US listed many main ________ (威胁) to African lions such as loss of habitat, lack of food and more conflicts with humans.

5．It is not allowed to ________ (猎杀) wild animals in many countries of the world.

6．Many wild animals have been ________ (灭绝的)  for various reasons.

7．We must try our best to keep our environment under careful ________(保护)．

8．Press these two keys to ________ (切换) between documents on the screen.

9．The majority of the students find the magazine ________ (有教育意义的) and useful to their English study.

10．The researchers say that more than one-third of ships in the southern Indian Ocean are fishing ________ (非法地)．

Ⅱ.单句语法填空

1．Many species are ________ (endanger) and could disappear off the face of the Earth very soon if we don't do anything to save them.

2．________(destroy) of the environment is one of the most serious challenges we face.

3．In his spare time, he either listens to soft music to relax himself or switch ________ the TV to watch the news.

4．His story is really so ________ (inform) that you can really benefit from it.

5．When the whole area was cut ________ by the flood, the government sent food there by helicopter.

6．The class is discussing a newspaper article that urges citizens ________ (help) reduce the noise and air pollution in the city.

7．The chairman asked me to cut ________ the report, because he didn't want to speak for too long at that meeting.

8．One-fifth of the animals and plants in this region are ________ threat of ________ (extinct)．

9．Noises, typically caused by ships or construction, do pose a threat ________ marine animals, disturbing their ability to locate food.

Ⅲ.课文语法填空

I went to a lecture by Professor Linda Wei yesterday. It was really informative! I learnt a lot about the environmental 1.________ (challenge) the world is facing now. I really feel 2.________ (strong) that we need to change the way we live in order 3.________ (protect) our planet. Professor Wei was very passionate about 4.________ (use) clean energy. We definitely need to switch to different forms of power as soon as possible.

5．________ the professor said：“We all have a role to play in protecting the environment. If we all do our part, we can live a 6.________ (healthy) life on Earth.”

Unit 3　Conservation

Part Ⅰ　Topic Talk

双基夯实·课前排查

Ⅰ.

1．urgent　2.incredibly　3.extinct　4.hunt　5.illegally

6．switch　7.threat　8.recycle　9.item　10.destroy

11．plastic　12.conservation

Ⅱ.

1．to switch　2.hunt　3.extinct　4.threat　5.urgent

6．illegally　7.plastic　8.destroyed　9.conservation

10．item　11.recycle

Ⅲ.

1．at present　2.in danger　3.live a．..life　4.do one's part　5.have a role　6.be passionate about　7.cut down

核心突破·要点讲解

►第一版块：重点单词

1．①threatened　②to　③threatening　④under

2．①on; to; off　②from　③My mum asked me to remember to switch off the lights before leaving the room.

3．①urgency　②(should) carry　③to take

4．①hunting　②hunter　③to hunt　④for

►第二版块：重点短语

1．①cut off　②cut in　③cut up　④cut down

2．①endangered; dangerous; endanger　②in danger　③in danger of; out of danger

夯实基础·一遍落实

Ⅰ.

1．urgent　2.Plastic　3.destroyed　4.threats　5.hunt

6．extinct on　7.conservation　8.switch　9.informative　10.illegally

Ⅱ.

1．endangered　2.Destruction　3.on　4.informative　5.off

6．to help　7.down　8.under　extinction　9.to

Ⅲ.

1．challenges　2.strongly　3.to protect　4.using　5.As　6.healthier