2024年中考英语人教版专项复习 第四讲 七年级下册 Units 5—8课件 (共92张PPT)

(共92张PPT)
中考英语人教版专项复习
第四讲 七年级下
Units 5—8
目录
01.
教材知识过关
02.
重点词汇短语
03.
模拟考题
01
教材知识过关
Ⅰ.语境填词
背一背
Group 1
1.friendly（adj.）友好的 ★be friendly to对……友好
2.shy（adj.）羞怯的；腼腆的［2019.56］
3.lazy（adj.）懒散的；懒惰的
4.hard（adj.）坚硬的；困难的（adv.）努力地；猛烈地；用力地
5.over（prep.）超过，多于；在……上方
6.danger（n.）危险；风险
★in danger处于危险之中
7.problem（n.）困难；难题
★no problem没问题；不客气［2014.33］
8.save（v.）救；救助；节约；节省［2020.50;2016.2］
Group 2
9.kind（adj.）友善的；和蔼的；仁慈的（n.）种类 ★be kind to对……友善；对……无害
10.forget（v.）忘记［2016.55］
11.spend（v.）花（时间、钱等）［2019.61］
12.pay（v.）付费（n.）薪水；工资［2017.51］
★pay for为……付费
13.use（v.）运用（n.）使用［2023.21］
★make use of...利用……
14.could（modal v.）能；可以
★couldn't be better/worse非常好/非常糟
15.behind（prep.）在……的后面；落后于；支持［2017.38;2016.53］
16.often（adv.）时常；常常
17.across（adv.& prep.）过；穿过
练一练［从左栏中选择合适的单词并用其正确形式填空］
Group 1
1.If you're too _____ to work in the fields, don't expect a harvest（收获）.
lazy
2.We'll _____ much time if we go by car.
save
3.This year's exam was much ________ than last year's, so few students
passed it.
harder
4.Don't jump a red light, because it may put your life in ________.
danger
5.We have to find a proper way to solve this _________.
problem
6.He is such a _____ boy that his face turns red when he speaks in public.
shy
Group 2
7.These are green products and they're______ to the environment.
kind
8.The work is hard, but the _____ is good.
pay
9.Try to exercise as ______ as possible.
often
10.You'll _______ the skills unless you practice often.
forget
11.Alice ran _______ the field after the rabbit.
across
12.The little boy hid himself ________ the door to give his sister a
surprise.
behind
13.I ____________ two hours a day training for the game.
spent/spend
14.My sister ______ walk when she was only nine months old.
could
15.Cutting down on the _____ of paper will help to save more trees.
use
Ⅱ.拓展提升
背一背
1.beauty（n.）美；美丽→beautiful（adj.）美丽的；美好的→beautifully（adv.）美丽地
2.rain（v.）下雨（n.）雨水→rainy（adj.）阴雨的［2021.8］
3.wind（n.）风→windy（adj.）多风的
4.cloud（n.）云；云朵→cloudy（adj.）多云的
5.sun（n.）太阳→sunny（adj.）晴朗的［2020.8］
6.snow（v.）下雪 （n.）雪→snowy（adj.）下雪的
7.miss（v.）思念；错过→missing（adj.）找不到的
8.visit（v.）拜访；参观 （n.）访问→visitor（n.）参观者
9.climb（v.）爬;攀登→climber（n.）登山者
练一练［从左栏中选择合适的单词并用其正确形式填空］
1._______ days are perfect for flying kites.
Windy
2.They looked at the _________ painting, losing themselves in its beauty.
beautiful
3.You'd better take an umbrella. The weather report says it's going to be a
______ day.
rainy
4.The _____ rises in the east and sets in the west.
sun
5.Hurry up or we'll ______ the beginning of the film.
miss
6.The air became cooler as they _________ higher.
climbed
7.To protect your teeth, you'd better _____your dentist at least twice a year.
visit
Ⅲ.短语填空
背一背
1.get lost 迷路
2.cut down砍倒；减少；缩减
3.eat out出去吃饭
4.across from...在……对面
5.（be） made of由……制成的
6.take a message捎个口信；传话
练一练［从左栏中选择合适的短语并用其正确形式填空］
1.If we don't ________, we'll never find a new way.
get lost
2.The Smiths seldom cook by themselves because they often ________.
eat out
3.I think people should stop _____________ trees, or the environment will
become worse.
cutting down
Ⅳ.仿写运用
背一背
1.The elephant is one of Thailand's symbols. 大象是泰国的象征之一。
2.I'm also visiting some of my old friends. I'm so happy to see them again.我也在拜访我的一些老朋友。我很高兴再次见到他们。
3.To get there, I usually walk out and turn right on Bridge Road.要去那儿（动物园）的话，我通常步行外出，在大桥路向右拐。
练一练［完成下列句子］
1.我喜欢跳舞。它是我的爱好之一。
I enjoy dancing. It's___________________.
one of my hobbies
2.我很高兴看到我的家乡发生了巨大的变化。
_______________________________great changes have taken place in my
hometown.
I'm very happy to see （that）
3.为了确保每个人都掌握了舞步，王老师给我们进行了一个测试。
____________________________________________ the dance moves, Miss
Wang gave us a test.
To make sure （that） everyone had mastered
考点1 over的用法
&1& They held a large umbrella over me.他们为我撑起一把大伞。
over作介词。用法如下：
（1）意为"在……上方"。如：
There was a light hanging over the table.桌子上方吊着一盏灯。
（2）意为"从一边到另一边，翻越"。如：
They ran over the grass.他们跑过草地。
（3）意为"覆盖在……上面"。如：
He put a quilt over her. 他给她盖上被子。
（4）意为"多于（某一时间、数量、年龄等）"。如：
He is over seventy. 他已年过七十。
常见的含over的短语如下：
get over克服,战胜困难；从……中恢复过来
come over（通常远距离地）从……来
语境小练
1.From the mountain top, you can have a view ___ the park.
D
A.behind B.between C.under D.over
2.To connect the two cities, a bridge will be built ___ the river.
B
A.beside B.over C.under D.through
3.To keep warm, she wore a jacket ___ her sweater.
D
A.behind B.below C.between D.over
4.The first step to ___ your shyness is to try to accept it and be
comfortable with it.
C
A.come across B.get off C.get over D.come over
考点2 behind的用法［2017.38；2016.53］
&2& The sun disappeared behind the clouds.太阳消失在云层后面。
behind作介词。用法如下：
（1）意为"在……的后面",可用作比喻。如：
I knew behind her smile was sadness.我知道她在用微笑掩饰内心的忧伤。
（2）意为"落后于"。如：
He's behind the rest of the class in reading. 他的阅读能力不及班上其他人。
（3）意为"支持"。如：
Whatever she does, her family is behind her. 无论她做什么，她的家人都支持她。
fall behind意为"落后，落在……后面"。如：
He soon fell behind the other swimmers in the race.比赛中他很快落在其他游泳选手后面了。
语境小练
5.To learn a language well, we should pay attention to the culture ___ the
language.
B
A.between B.behind C.past D.across
6.Keep your face towards the sun and darkness will fall ___ you.
A
A.behind B.beside C.under D.over
7.—I want to enter the competition but I'm not sure if I can win.
—Just go ahead. I'm ___ you all the way.
C
A.between B.past C.behind D.below
8.Though he ___ others, he doesn't give up.
D
A.puts down B.takes after C.gives up D.falls behind
考点3 询问天气的句型［2021.8；2020.8；2015.68］
&3& How's the weather in Beijing 北京的天气怎么样？
询问当下或过去的天气，应用如下句式：
询问未来的天气，应用如下句式：
对于上述问题，答语通常用如下结构：
It is/was/will be+描述天气状况的形容词.
常见的描述天气状况的形容词有：
语境小练
9.—___ is the weather like here in summer
—It's usually hot and wet.
B
A.Where B.What C.How D.When
10.—Do you know ___ the weather will be tomorrow
—The weatherman says it will be rainy.
C
A.when B.why C.how D.what
11.—What's the weather like today
—It's ___. We'd better stay inside.
D
A.cool B.sunny C.warm D.rainy
考点4 spend的用法［2019.61］
&4& Never spend your money before you have it. 决不要将尚未到手的钱花出去。
spend作动词，意为"用，花（钱），花（时间）"。如：
①How much have you spent 你已经花了多少钱？
②If we want to be healthy, we should spend some time in the sun each day.我们如果想要健康，就应该每天花时间晒太阳。［2023天津中考］
spend/pay/cost/take
辨析 主语 常用结构
spend 人 doing sth.
on sth.
doing sth.
on sth.
sb. spend（s） money
sb. spend（s） time
辨析 主语 常用结构
pay 人 sb. pay（s） money for sth.
cost 物 sth. cost（s） sb. money
take it It takes sb. money/time to do sth.
续表
语境小练
12.We're not supposed to ___ too much time on our phone.
B
A.cost B.spend C.take D.pay
13.We don't have to ___ for the concert. It's free for students.
C
A.enter B.decide C.pay D.wait
14.—Why didn't you buy the sports shoes just now
—They ___ too much. I need to pay 1,000 yuan for a pair. Can you
believe that
B
A.weigh B.cost C.pay D.spend
15.Li Mei works in Shanghai. It___ her about an hour to get to work by
underground every day.
D
A.costs B.spends C.pays D.takes
考点5 enjoy的用法［2021.53］
&5& It is very quiet and I enjoy reading there. 那里很安静，我喜欢在那里读书。
动词enjoy意为"喜欢，欣赏"。
enjoy sth."喜爱/欣赏某物"
enjoy doing sth."享受做某事"
—How do you like the story？你觉得这个故事怎么样？
—Fantastic. I enjoy it so much.很精彩，我十分喜欢这个故事。
enjoy oneself表示"玩得开心"，相当于have fun或have a good time。如：
They all enjoyed themselves at the party. 他们在聚会上都玩得很开心。
语境小练
16.—How did you like the show
—It was great. I___ every minute of it.
B
A.forgot B.enjoyed C.kept D.chose
17.Every minute in your life is a gift, so treasure it and ___ it to the
fullest now.
C
A.find B.regret C.enjoy D.miss
18.—Mom, I'm leaving for Lily's party.
—OK.___, my darling.
D
A.My pleasure B.Take it easy C.Good luck D.Enjoy yourself
考点6 "How's it going？"句型
&6& How's it going 最近怎么样？
寒暄时，询问他人的近况或事情进展的状况可用：
答语常用：Fine./Great./Pretty good./Not bad./Not so well./Terrible.等。如：
A: Hello, Bob! How's everything going
B: Hello, Kate! I'm fine. And you
A: Not bad.
语境小练
19.—Hey, Emily, how's it going
—___. I've made progress in English and got an "A" in the exam.
D
A.No problem B.That's a pity C.Bad luck D.Pretty good
20.—Hey, how's everything going
—___. I had terrible toothache all last night.
A
A.Not so well B.No problem C.Not at all D.Not too bad
课标新增词汇速递
1 duty / dju ti/, / du ti/
含义 n.责任；义务；本分；上班；职责
搭配 on/off duty值班/下班；值勤/不值勤
例句 ●As a TV reporter, it's my duty to tell the truth to the public.
●Although it's a public holiday, some firefighters are still on duty.
2 hunt /h nt/
含义 v.打猎；猎取；搜寻
例句 Some wild animals may disappear forever if we don't stop hunting them.
3 focus / f k s/, / fo k s/
含义 v.集中（注意力、精力等于）
例句 With an empty stomach, one finds it difficult to focus in class. ［2023苏州中考］
4 recommend / rek mend/
含义 v.推荐，介绍；劝告；建议
例句 I recommend the Slender West Lake. A boat tour is a wonderful experience!［2023扬州中考］
从所给的选项中，选出加黑单词的汉语意思。
1.smart
A.adj.整洁漂亮的 B.adj.智能的［2018.87］
C.adj.聪明的［2022.79］
（1）The robot is really smart because it only kills grass but not crops
（庄稼）.___
B
（2）Harry is one of the smartest kids in the class.___
C
（3）They were wearing their smartest clothes.___
A
2.water
A.v.流口水 B.v.充满眼泪
（1）My eyes were watering as I cut up the onions（洋葱）.___
B
（2）Just smelling chocolate makes my mouth water. ___
A
3.hot
A.adj.风靡一时的;很受欢迎的［2023.24］
B.adj.辣的;辛辣的
（1）I love hot food, like mapo tofu. ___
B
（2）This is one of the hottest clubs in town.___
A
4.study
A.n.（专题）研究；调查 B.n.书房［2023.6］
（1）She spent the evening reading in the study.___
B
（2）The study was carried out between January and May 2022.___
A
5.warm
A.adj.热情的；友好的［2021.19］
B.adj.暖色调的;有暖感的
C.v.（使）温暖；变暖和
（1）Come in and warm yourself by the fire.___
C
（2）We hope the color gives the house a warm and inviting feel.___
B
（3）She was a warm and loving mother.___
A
6.bank
A.n.库存；库 B.n.河畔；岸［2017.94］
（1）We sat on the bank of the river.___
B
（2）I like reading because reading leads me into a bank of
knowledge.___
A
7.turn
A.v.转弯 B.n.（依次轮到的）机会
（1）I turned the car into the car park.___
A
（2）You'll just have to wait your turn like everyone else.___
B
Ⅰ.单项填空
1.[2023安徽中考] —Camping trips in spring have become very ___ in
southern China.
—Exactly. That's because these areas have warmer weather and an earlier
flowering season.
A
A.hot B.safe C.cheap D.hard
2.[2023安徽中考] The proper ___ of your spare time will make your life
colorful.
B
A.date B.use C.name D.cause
3.[2023安徽中考] —Jim, I've got a problem with my car. Could you help
me
—Sorry, not right now. I ___ a short video.
C
A.make B.have made C.am making D.was making
4.[2017安徽中考] To my pleasure, my family is always ___ me whatever I
decide to do.
B
A.above B.behind C.from D.through
5.[2023辽阳中考] Thanks to the teacher's help, I solved all the ___ easily.
B
A.chances B.problems C.habits D.grades
6.[2023牡丹江中考改编] A man should be strict with himself, but be ___
to others.
C
A.similar B.harmful C.friendly D.silent
7.[2023合肥包河区一模] —Mr. White, you'd better rest for several weeks
before exercising.
—Thanks. It does take time to ___ the illness.
B
A.pay off B.get over C.look around D.hang out
8.—Jenny, it's raining outside. Shall I give you a ride
—Thanks. ___.
D
A.Take it easy B.Better not
C.Never mind D.It couldn't be better
Ⅱ.单词拼写
1.[2022安徽中考] The advice my English teacher gave me was s______
（聪明的） and useful.
mart
2.[2021安徽中考] Lucy often v __________（看望） her grandparents in
her spare time.
isits/isited
3.[2020安徽中考] You'll find a nicer world if you're k_______________
（友善的） and helpful to people around.
ind/ind-hearted
4.[2015安徽中考] Please accept our best w______（祝愿） for your exams.
ishes
5.This r____（比赛） will be ours to fight for, and to win.
ace
02
重点词汇短语
1.________（n.）动物
animal
2._____（adj.）可爱的；机灵的
cute
3._____（adj.）懒散的；懒惰的
lazy
4._______（adj.）聪明的
smart
5._________（adj.）友好的
friendly
6._____（adj.）羞怯的；腼腆的
shy
7.______（adv.）（坐、躺、倒）下 （prep.）向下；沿着
down
8._____（prep.）超过，多于；在……上方
over
9.__________（adv.）在明天 （n.）明天；未来
tomorrow
10._____________（n.）超市
supermarket
11._____（adj.）任何的；任一的 （pron.）任何；任一
any
12.______（adj.）另外的；其他的 （pron.）另外的人（或物）
other
13._______（adj.）幼小的；年轻的
young
14.______（v.）怀念；思念；错过
miss
15.______（v.）希望
wish
16._________（adj.）可口的；美味的
delicious
17._________（n.）天气
weather
18._________（n.）信息；消息
message
19._________（n.）困难；难题
problem
20.______（adv.）再一次；又一次
again
21.______（adv.）不久；很快
soon
22.______（adv.）努力地 （adj.）困难的
hard
23.______（n.）旅馆；酒店
hotel
24.___________（n.）餐馆
restaurant
25._________（n.）医院
hospital
26.______（prep.）在……附近
near
27.________（prep.）在……周围 （adv.）在周围；大约
around
28._______（v.）爬
climb
29.______（adv.）时常；常常
often
30.______（v.）享受；喜爱
enjoy
1.beauty（n.）→_________（adj.）美丽的；美好的→___________（adv.）
美丽地
beautiful
beautifully
2.sleep（v.& n.）→______ （过去式/过去分词）睡觉
slept
3.forget（v.）→_______（过去式）→__________（过去分词）忘记；遗忘
forgot
forgotten
4.danger（n.）→___________（adj.）有危险的；不安全的
dangerous
5.cut（v.）→____（过去式/过去分词）砍；切
cut
6.drink（v.& n.）→_______（过去式）→_______（过去分词）喝
drank
drunk
7.man（n.）→_____（pl.）男人；人
men
8.child（n.）→_________（pl.）儿童
children
9.rain（v.& n.）→______ （adj.）阴雨的；多雨的
rainy
10.wind（n.）→_______（adj.）多风的
windy
11.cloud（n.）→_______（adj.）多云的
cloudy
12.sun（n.）→_______（adj.）晴朗的
sunny
13.snow（v.& n.）→_______（adj.）下雪的
snowy
14.bad（adj.）→_______ （比较级）更坏的；更差的→_______（最高级）
最坏的；最差的
worse
worst
15.hot（adj.）→_______（比较级）较热的→________（最高级）最热的
hotter
hottest
16.visit（v.）→_______ （n.）游客；访问者
visitor
17.sit（v.）→____（过去式/过去分词）→_______（现在分词）坐
sat
sitting
18.country（n.）→__________（pl.）国；国家
countries
19.pay（v.& n.）→______（过去式/过去分词）付费
paid
20.spend（v.）→______（过去式/过去分词）花（时间、钱等）
spent
1.________ 稍微；有点儿
kind of
2.___________ 迷路
get/be lost
3._______________________处于（极大）危险之中
be in （great） danger
4.__________砍倒
cut down
5.__________________看报纸
read a newspaper
6.___________做汤;煲汤
make soup
7.________________________看电影
go to the movies/cinema
8.________出去吃饭
eat out
9._______________捎个口信；传话
take a message
10._____________给某人回电话
call sb. back
11.__________________度假
on （a） vacation
12.____________在……对面
across from
13.___________在……前面
in front of
●谈论他人或自己正在干什么
1.—_________________ 他正在做什么？
—He's studying at his friend's home.他正在他的朋友家学习。
What's he doing
●描述天气
2.—_________________________________________ 天气怎么样？
—It's cloudy./It's sunny./It's raining.多云。/晴天。/正在下雨。
How's the weather/What's the weather like
●询问近况
3.—_______________ 最近怎么样？
—Great! /Not bad./Terrible!很好！/不错。/很糟糕!
How's it going
●问路和指路
4.—__________________________？这附近有银行吗？
—Yes, there is. It's on Center Street.是的，有银行。它在中央大街上。
Is there a bank near here
5.—__________________ 旅馆在哪里？
—It's behind the police station.在警察局后面。
Where's the hotel
●请求
6.—______________________________ 我能给他捎个口信吗？
—Yes.可以。
Can I take a message for him
7.—__________________________________ 你能告诉他给我回个电话吗？
—OK.好的。
Could you tell him to call me back
03
模拟考题
Ⅰ.单项填空
1.[2023江西中考] —Kevin, could you pass me some ___ It's so hot today.
I'm really thirsty.
—OK. Here you are.
C
A.rice B.bread C.water D.chicken
2.新考法·结合安全常识 Tips: For our own safety, we'd better not stand
under big trees on ___ days in summer.
C
A.sunny B.cloudy C.rainy D.foggy
3.The hotel is almost finished, but it ___ needs one or two weeks to get
ready for guests.
D
A.only B.also C.even D.still
4.I'm interested in history, so I never ___ the chance to visit the local
museum when I go to a new city.
B
A.give B.miss C.pass D.get
5.The traffic light is green. Let's go ___ the road.
C
A.against B.among C.across D.above
6.I'll spend half of my holiday practicing English and ___ learning drawing.
A
A.the other B.another C.other's D.other
7.—I'm afraid of speaking in public. What should I do
—In order to ___ the shyness, you can try saying "Hi" to people first.
D
A.care about B.take in C.look through D.get over
8.[2023黄山一模] —Hurry up, Jeff! Let's cross the road as fast as possible.
—No, you ___. Don't you see the light is still red
C
A.couldn't B.wouldn't C.mustn't D.needn't
9.[2023河北中考] Some students ___ Tai Chi over there. Let's go and join
them.
C
A.play B.played C.are playing D.were playing
10.—How do you like the bike you bought last week
—___. It becomes much easier to go to work now.
A
A.It couldn't be better B.It needs repairing
C.I must complain about it D.It's out of style
Ⅱ.完形填空
[2023潍坊中考]
自来水的前世今生
When you turn on the tap in your house, water comes out. This water has _1._ a long way. This water comes from rain in the sky. The _2._ that water arrives to the tap in your house is called the "water supply".
Most of the water on the earth is in the _3._. This water has a lot of salt in it. We cannot drink this water. Salt water makes us ill. But when the sun shines, it _4._ a part of the ocean. This water rises up to make clouds in the sky. The more water rises up, the heavier and larger the clouds become. The clouds will get so heavy and large that they will change colour from white to _5._. The water will fall down into rivers and lakes _6._ rain and travel back to the sea. This is called the "water cycle". We use half of the rainwater _7._ falls over the earth.
There are parts of the world where there is _8._ fresh water. In the Arab countries, salt water can be made safe to drink. This is done by freezing or boiling it. The salt is left _9._ and the clean water is then taken off. This process is very _10._, but in some areas this is the only way to get clean drinking water.
1.( ) A.pulled B.walked C.rushed D.travelled
D
2.( ) A.way B.path C.message D.condition
A
3.( ) A.stream B.ocean C.river D.lake
B
4.( ) A.takes in B.gives off C.heats up D.cools down
C
5.( ) A.purple B.grey C.blue D.pink
B
6.( ) A.through B.with C.as D.by
C
7.( ) A.it B.that C.this D.what
B
8.( ) A.few B.much C.enough D.little
D
9.( ) A.behind B.alone C.off D.out
A
10.( ) A.rapid B.cheap C.simple D.expensive
D
Ⅲ.补全对话
新情境·品读经典
A: Li Lei, what book are you reading
B: It is Journey to the West. This is an English version（版本） of the story.
A: 1.___ Is it difficult to understand
B: Yes, it's a little hard. You know there are plenty of new words.
A: 2.___
E
F
B: I think it's great. Though I've read the Chinese version of the story, this
version still gives me something new to think about.
A: Oh, I see. Can you lend the book to me after you finish reading it？
B: 3.___ I'm sure you'll learn a lot from it.
A: I think so. By the way, there will be a competition of telling Chinese
stories in English next month. Will you take part in it？
B: 4.___ I think I will have a try.
A: I believe you will do well in it. 5.___
B: Thank you.
B
G
A
A. Good luck.
B. No problem.
C. Enjoy yourself.
D. Why not read it yourself？
E. Wow, you're really something.
F. How do you like the book
G. It sounds like a fun activity.
Ⅳ.阅读理解
A
一起"动"起来！
Welcome to Buddy Ball
Buddy Ball is a non-profit（非营利的） programme which provides a
chance for kids with disabilities to take part in different sports.
_________________________________________________
How does Buddy Ball work
Each sport is recreated so no matter what the abilities of the kid,
they will be able to enjoy sports. Volunteer buddies will help the kids
while teaching the basic rules of the games.
There is NO COST to take part and NO PRACTICE, JUST FUN!
续表
What can a buddy do
Pam is a buddy for an eleven-year-old called Tom. Tom moves in a
wheelchair（轮椅） and is a good basketball player. But he'll get angry or
cry and won't want to play if he misses a shot（投篮） or makes a bad
pass. As his buddy, Pam encourages him. Now Tom is more confident（自
信的） and doesn't get upset so easily.
续表
Be a buddy
Buddy Ball is a great chance for everyone! Differences disappear and
we realize that we're all just kids who love playing sports. Believe that
you'll do something really useful.
Join us in our next event!
续表
1.What can Buddy Ball do for kids with disabilities？( )
C
A.Help them to get excellent marks.
B.Encourage them to develop good habits.
C.Provide them with chances of doing sports.
D.Develop their interest in after-school activities.
2.How does Pam help Tom ( )
B
A.By recreating the game for him. B.By encouraging him to keep trying.
C.By helping him with his wheelchair.
D.By teaching him to play basketball.
3.What is the main purpose of the text ( )
C
A.To introduce a ball game. B.To call on people to do sports.
C.To invite people to be a volunteer.
D.To remind people to care about kids.
B［原创新题］
狗狗眼中的世界
It's said that dogs are color-blind. But is this true
Just like us, dogs have retinas （视网膜）. Dogs also have cone cells （视锥细胞） and rod cells （视杆细胞） . The cone cells allow dogs to perceive （感知） color and see tiny things, while the rod cells help them see things in the dark and notice movement.
Most humans have three kinds of cone cells: blue, red and green. They allow us to tell the difference between colors. However, dogs have only
two kinds of cone cells. One kind is blue, and the other lies somewhere between red and green. So dogs are unable to tell orange, red and green. They can only see things in yellow, blue, grey, brown, white and black. In other words, the vision （视力） of dogs is similar to that of a red-green color-blind human. Although they have fewer kinds of cone cells, dogs have more rod cells than humans. This allows them to see more clearly in the dark and notice movement more exactly. While a camper is spending a night outdoors with his dog, for example, the dog may suddenly stand up and stare into the darkness. This can be a little worrying for campers. The
dog, however, may have simply seen a mouse moving across the grass that we might never be able to spot
While it may be true that dogs see fewer colors, they can still see better than us in many other ways!
4.Which colors can't a dog see
①black ②orange ③blue ④yellow
⑤green ⑥brown ⑦white ⑧grey ⑨red( )
A.①③⑤ B.④⑥⑧ C.②⑤⑨ D.⑤⑦⑨
C
5.What does the underlined word "spot" mean ( )
D
A.perform B.join C.hide D.see
6.新考法·篇章结构 What's the structure of the text （P=Paragraph）( )
A
A.&1& B.&2& C.&3& D.&4&
7.What's the best title for the text ( )
A
A.Are dogs color-blind B.Do dogs see us as friends
C.Do dogs have retinas D.Can dogs see better than us
非常感谢您的观看