教材题点拨
COMPREHENDING
☞Suggested answers to Exercise 1：
1 The mother was upset because a family of snakes had made their home near the house
2 The writer was happy because it gave her an opportunity to help her mother and invent something to catch the snakes without hurting them at the same time
3 These are the three creative steps she writer took to trap the snakes by cooling them and making them sleepy so she could catch them
●Step 1：She bought a stainless steel ice cream maker and froze the bowlShe added ice cubes to the top of the bowl to keep it coldShe placed it over the snakes＇ habitat during the day so that the snakes would become sleepy and could be easily caught
●Step 2：As above she did the same but placed the bowls over the snakes＇ habitat in the evening
●Step 3：As above but added a net to catch the snakes
4 Snakes do not have a way of keeping warm in their bodiesThey get warmth from the sun and become more active at this timeWhen the sun goes down at night they cool down and become less activeSo extra cooling to the snake would make them even less active and easier to catch
LEARNING ABOUT LANGUAGE
Discovering useful words and expressions
☞Answers to Exercise 1：
1 cube cubic base basic
mercy merciful fancy fanciful
stain stainless care careless
caution cautious poison poisonous
2 expect expectation relax relaxation
produce production reduce reduction
identify identification satisfy satisfaction
3 strong strengthen long lengthen
freezing freeze disappointing disappoint
☞Answers to Exercise 2：
1 The greengrocer at the corner is probably the most_convenient to reach
2 If you want to apply for a credit cardyou must provide valid identification
3 You need to approach that animal with caution as it may bite
4 She is passive during meetings and does not contribute to discussions at all
5 I found his phone number in the directory and tried to callring_him_up last nightbut there was no replyLater I found I dialed the wrong number
6 I don＇t think of my hometown very muchonly now_and_then
7 Luckily the rainfall stopped abruptly before I left
8 In a courtroom it is sometimes difficult to distinguish who is innocent and who is guilty
☞Answers to Exercise 3：
criteriaabruptlyfilevalidperfumeseizeset aboutproduct
☞Suggested answers to Exercise 4：
Picture 1：
In the courtyard of this house there are two walnut treesAn old woman lives in the house and has watched the walnuts ripen over several monthsSadly she is unable to pick the ripe walnuts because they are too high for her to reachShe calls her granddaughter and asks her to help find some students to pick the walnuts
Picture 2：
Her granddaughter goes to her schoolThere is a notice board in her classroom where students can put up requests for helpAlthough she is unsure whether anyone will come and helpwith glue she puts up her notice asking for assistance
Picture 3：
Her notice is entirely successfulHer grandmother looks on happily as her fellow students merrily run up and down ladders and bang branches with bamboo sticks to bring down all the walnutsShe will give them a lovely meal of dumplings when they have finished to thank them for all their help
Discovering useful structures
☞Answers to Exercise 1：
1 I placed the frozen bowl over the snakes＇ habitat
2 The next morning I carried in my hand a small net used for catching fish
☞Answers to Exercise 2：
1 signed 2 disappointed
3 understood 4 embarrassedbeaten 5 pleased
☞Answers to Exercise 3：
designeddevelopedrejectedwelcomedtestedimprovedadopted
☞Answers to Exercise 4：
1 the play performed 2 the car started
3 her paintings displayed 4 your courtyard tidied
USING LANGUAGE
Listening and speaking
LISTENING TEXT
GOOD DESIGN IS PRACTICAL
Zhou Rui(ZR)made a phone call to Dr Smith(S)an engineer who works for James Dysona famous British inventorNow Dr Smith is ringing him back
S： Hellocan I speak to Zhou Rui please？This is Dr Smith
ZR：Good morningDr SmithHow kind of you to ring me backWould you mind if I asked you a few questions about James Dyson＇s inventions
S： Not at allI＇d be happy to talk about our company and our founder James DysonHe＇s an inventor who takes everyday productslike washing machinesand makes them work better
ZR：I seeWhy did he improve the washing machine
S： He found that clothes were not as clean from a washing machine as those washed by hand
ZR：Really？Is that true
S： Yesbecause most machines have one large drum and the clothes go round and round in it
ZR：So what did he do to improve that
S： This is the clever partJames Dyson invented a system with two drums in the same machineTogether they are the same size as the old drumbut they work differentlyOne drum goes in one direction and the other goes in the otherSo it＇s more like handwashing and the clothes come out cleaner
ZR：Was it easy to design
S： NoIt took many working models before Mr Dyson was satisfied
ZR：How long did it take him
S： I＇m not sureBut I do know that inventing a new carpet cleaner took five years before he was happy with it
ZR：WowI didn＇t realize that it took that long
S： And of course he had to apply for patents for all of the new parts he＇d designedYou must do that to protect your ideas
ZR：Has that been a problem
S： Wellin the early yearsJames Dyson found that a large company making carpet cleaners in America was copying his ideasHe had to go to court to protect his invention
ZR：Did he win
S： Yesin the end the company had to pay us a lot of money
ZR：What new ideas does James Dyson have
S： I＇m sorry but you＇ll just have to wait and see
ZR：Thank you very much and I＇m afraid I shall have to ring off nowGoodbye
S： Goodbye
☞Answers to Exercise 2：
washing machinedrumcarpet cleanercourt
☞Answers to Exercise 3：
Object
The problem
James Dyson＇s improvement
Washing machine
Washing machines at that time do not clean the clothes as well as by hand
He invented a machine using two drums which move in opposite directions
练册答案听力原文
Unit 3 Inventors and inventions
LISTENING
LISTENING TEXT
WHICH ONE SHOULD I CHOOSE
Ruth Bacon(RB)is asking her friendZhang Jie(ZJ)for advice
RB：Hellois that Zhang Jie？This is RuthI＇m thinking of buying a new mobile phoneWhat do you suggest
ZJ：Hello RuthI＇m happy to helpIt＇s lucky you could get throughI＇ve been having some trouble with the line and I keep getting cut offIf the line goes deadring me back immediately on my mobile and it should be OKNow what do you want your mobile to do
RB：WellI＇ve heard about mobiles that are computers and can videotape as wellDo you think they＇re a good idea
ZJ：MmmYesthey＇re usefulI can use the Internet even when I＇m on the train
RB：So you suggest one like that then
ZJ：Not necessarilyIt seems there＇ll be some new mobile phones coming on the market next yearThey＇re going to be even more powerful
RB：What are they going to do
ZJ：Ohyou＇ve no idea what they＇re planningThese new phones will be able to organize your lifeThey＇re called 3G phones because they＇re the third generation of mobile phonesTheythinkfor you
RB：How can they do that
ZJ：Wellthey＇ll be able to help you plan a holidayThe phone will book air tickets and the hotelThen it＇ll pay for you
RB：WowI＇m not sure I＇d be happy with thatI don＇t like the idea of a machine spending my money
ZJ：Wellmany businesses already use mobile phones to buy goodsThey leave them to order goods when they are at their cheapest
RB：Do they really？WellI neverWhat I need is a mobile to stop me missing important callsI missed three yesterday because my mobile was switched off
ZJ：You can have that tooThere＇s a new mobile coming out soon that will turn itself on when important calls come through
RB：Are you sure？If that＇s the casethat＇s the one for meThank youZhang JieI think I＇ll wait for that oneGoodbye
ZJ：Goodbye
☞Answers to Exercise 2：
a mobile thatthinks
a mobile that spends your money
a mobile that plans your holiday
a mobile that does videotaping
a mobile that is a computer
☞Suggested answers to Exercise 3：
1 Ruth wants to buy the mobile that turns itself on when it receives important callsShe missed three yesterday when her mobile was switchedturned off
2 Mobiles can videotape and act as a computer now
3 They will be able to plan holidaysbook air ticketshotel and an appropriate place to stayThey will authorize paying for them too
4 Ruth is worried because it might spend her money
5 The advantages are that they help people who are busy at work to order goods at the cheapest price or book holidaysair ticketsetc
6 The mobile may spend money unwisely or spend more than a person can affordYou may forget the spending and not include it in your accounts of your personal income
USING WORDS AND EXPRESSIONS
☞Answers to Exercise 1：
set out ＝ to begin to do sth
to make plans to do sth
set down ＝ to write about sth
set up ＝ to build
set off ＝ to begin a journey
to set fire to
set aside ＝ to cancelto ignore
set about ＝ to start doing sth
to deal with sth in a particular way
1 set aside 2 set out 3 set down 4 set off 5 set up 6 set about 7 set off
☞Answers to Exercise 2：
tapdotswirepracticalinvaluablecompetencepersonneldynamicstable
☞Answers to Exercise 3：
extensionHang onringcallupout of orderget throughcallbackring off
☞Suggested answers to Exercise 4：
1 The eyewitness—a greengrocer proved in court that the driver was innocent of the terrible accidentwhich caused a traffic jam that lasted for several hours
2 I could not bear to live in a city with so much rainfall even though it is good for my skin
3 Helicopters and jeeps are widely used in current wars
4 My associate checked the telephone directory and found the number to dial the aftersales service department when his refrigerator broke down
5 The little girl bumped her head on a corner of the desk and it left a mark like a triangle on her forehead
6 The identification of the correct route was difficult as it was too foggy early in the morning
7 Even though he couldn＇t swimhe dived into the river to save the little girl
8 In summerfarmers like to wear straw hats while working in the fields
USING STRUCTURES
☞Answers to Exercise 1：
disappointingdisappointedamusing
amusedconfusingconfused
surprisedsurprisinginspiredinspiringshockingshocked
☞Answers to Exercise 2：
1 confusedconfusing
2 shockedshocking
3 surprisedsurprising
4 amusing amused
5 disappointingDisappointed
6 inspiringinspired
READING TASK
☞Suggested answers to Exercise 1：
1 Leonardo lived at a time of great instabilitywhen paintings did not always provide a steady income
2 His designs were different because he took things apart and then improved themSo his designs were accurate and could be built and used
3 Painting helped him with his inventions because while painting he had learned to observe things closely and draw accurately
☞Answers to Exercise 2：
Possible skills
from Leonardo
from you
artist
famous paintings such as Mona Lisa
engineer
designed canals
and bridges
architect
designed cities
doctor
not mentioned
inventor
designed many new things such as the bicyclea helicopter and anautomobileetc
scientist
took things apart and found out how they worked in order to design a better one
LISTENING TASK
LISTENING TEXT
WHAT CAN IT BE
Ellie Smith(ES)is discussing with one of her friends Tang Ling(TL)what this invention by Leonardo might be
ES：Look at this drawingWhat do you think this is supposed to be
TL：I don＇t knowIt doesn＇t saybut let＇s see if we can work out what it is
ES：OKNow let＇s seeIt looks a bit like a tent but has four wheels underneath
TL：You＇re rightbut when you look at the second picture with the wheelsyou can see that it had a floor to stand on and wheels below thatDo you think it was a roundabout for children
ES：Good thinkingBut the way that he placed the wheels shows that it must have been for going forwards and backwardsnot round and roundNoI don＇t think it was a roundabout
TL：Let＇s look at it againDo you think it＇s made of metal？The wheels seem to have handles to move them
ES：In that case it must have been large enough for more than one personYou would have needed four people－one to move each wheelSo it cannot be a tent as that is made of cloth
TL：YesI think you＇re right
ES：It also seems to have something like sticks coming out of the bodyDo you think they are for decoration
TL：PerhapsThat is possible as we know Leonardo was an artist
ES：Yes and if that were the caseperhaps it was for fun for the familyIt could carry four people to move the wheels and then another one or two children to helpMaybe six altogether
TL：WowSo it must have been made of metalNothing else could carry all that weight
ES：TrueThe wheels must be made of wood or metal
TL：Do you think it＇s a caravan
ES：Yesthat makes senseIt would be big enough but there doesn＇t seem to be any room to sleep in itAnd it wouldn＇t be very easy to park for the nightSo perhaps it was an early car
TL：Welllet＇s look in the guidebookOh no—it seems you＇re not correct
ES：GraciousSo what on earth can it be
TL：Think again about Leonardo＇s lifeCan＇t you guess
☞Suggested answers to Exercise 3：
The girls＇suggestion
Reasons for
Reasons against
1 a roundabout
has four wheels and a floor
wheels go forwards and backwardsnot round and round
2 a tent
the appearance
made of metal and not cloth
3 a caravan
can movebig enough to carry a family
no room to sleep in itnot easy to park at night
WRITING TASK
☞Sample writing：
The Abacus
The abacus was originally made of woodIt is a rectangular shape with beads strung on itThe shape is unevenly divided so that there are more beads in one part than the other
To use an abacus you need to take lessonsThe smaller part with fewer beads represents the higher numbers and the larger part with more beads represents the smaller numbersBy manipulating these beads you can do a series of different calculationsAn abacus can be used to add figures quickly or do a series of complicated mathematical problemsPeople who are skilled with it can work as fast as a person using a modern calculator
The abacus was in general use from earliest times in ChinaIt is not known whether one person or a group of people invented itBut its value for computation is invaluableIt is one of the few Chinese inventions that was not adopted by the West
文档香网(httpswwwxiangdangnet)户传
《香当网》用户分享的内容，不代表《香当网》观点或立场，请自行判断内容的真实性和可靠性！
该内容是文档的文本内容，更好的格式请下载文档
COMPREHENDING
☞Suggested answers to Exercise 1：
1 The mother was upset because a family of snakes had made their home near the house
2 The writer was happy because it gave her an opportunity to help her mother and invent something to catch the snakes without hurting them at the same time
3 These are the three creative steps she writer took to trap the snakes by cooling them and making them sleepy so she could catch them
●Step 1：She bought a stainless steel ice cream maker and froze the bowlShe added ice cubes to the top of the bowl to keep it coldShe placed it over the snakes＇ habitat during the day so that the snakes would become sleepy and could be easily caught
●Step 2：As above she did the same but placed the bowls over the snakes＇ habitat in the evening
●Step 3：As above but added a net to catch the snakes
4 Snakes do not have a way of keeping warm in their bodiesThey get warmth from the sun and become more active at this timeWhen the sun goes down at night they cool down and become less activeSo extra cooling to the snake would make them even less active and easier to catch
LEARNING ABOUT LANGUAGE
Discovering useful words and expressions
☞Answers to Exercise 1：
1 cube cubic base basic
mercy merciful fancy fanciful
stain stainless care careless
caution cautious poison poisonous
2 expect expectation relax relaxation
produce production reduce reduction
identify identification satisfy satisfaction
3 strong strengthen long lengthen
freezing freeze disappointing disappoint
☞Answers to Exercise 2：
1 The greengrocer at the corner is probably the most_convenient to reach
2 If you want to apply for a credit cardyou must provide valid identification
3 You need to approach that animal with caution as it may bite
4 She is passive during meetings and does not contribute to discussions at all
5 I found his phone number in the directory and tried to callring_him_up last nightbut there was no replyLater I found I dialed the wrong number
6 I don＇t think of my hometown very muchonly now_and_then
7 Luckily the rainfall stopped abruptly before I left
8 In a courtroom it is sometimes difficult to distinguish who is innocent and who is guilty
☞Answers to Exercise 3：
criteriaabruptlyfilevalidperfumeseizeset aboutproduct
☞Suggested answers to Exercise 4：
Picture 1：
In the courtyard of this house there are two walnut treesAn old woman lives in the house and has watched the walnuts ripen over several monthsSadly she is unable to pick the ripe walnuts because they are too high for her to reachShe calls her granddaughter and asks her to help find some students to pick the walnuts
Picture 2：
Her granddaughter goes to her schoolThere is a notice board in her classroom where students can put up requests for helpAlthough she is unsure whether anyone will come and helpwith glue she puts up her notice asking for assistance
Picture 3：
Her notice is entirely successfulHer grandmother looks on happily as her fellow students merrily run up and down ladders and bang branches with bamboo sticks to bring down all the walnutsShe will give them a lovely meal of dumplings when they have finished to thank them for all their help
Discovering useful structures
☞Answers to Exercise 1：
1 I placed the frozen bowl over the snakes＇ habitat
2 The next morning I carried in my hand a small net used for catching fish
☞Answers to Exercise 2：
1 signed 2 disappointed
3 understood 4 embarrassedbeaten 5 pleased
☞Answers to Exercise 3：
designeddevelopedrejectedwelcomedtestedimprovedadopted
☞Answers to Exercise 4：
1 the play performed 2 the car started
3 her paintings displayed 4 your courtyard tidied
USING LANGUAGE
Listening and speaking
LISTENING TEXT
GOOD DESIGN IS PRACTICAL
Zhou Rui(ZR)made a phone call to Dr Smith(S)an engineer who works for James Dysona famous British inventorNow Dr Smith is ringing him back
S： Hellocan I speak to Zhou Rui please？This is Dr Smith
ZR：Good morningDr SmithHow kind of you to ring me backWould you mind if I asked you a few questions about James Dyson＇s inventions
S： Not at allI＇d be happy to talk about our company and our founder James DysonHe＇s an inventor who takes everyday productslike washing machinesand makes them work better
ZR：I seeWhy did he improve the washing machine
S： He found that clothes were not as clean from a washing machine as those washed by hand
ZR：Really？Is that true
S： Yesbecause most machines have one large drum and the clothes go round and round in it
ZR：So what did he do to improve that
S： This is the clever partJames Dyson invented a system with two drums in the same machineTogether they are the same size as the old drumbut they work differentlyOne drum goes in one direction and the other goes in the otherSo it＇s more like handwashing and the clothes come out cleaner
ZR：Was it easy to design
S： NoIt took many working models before Mr Dyson was satisfied
ZR：How long did it take him
S： I＇m not sureBut I do know that inventing a new carpet cleaner took five years before he was happy with it
ZR：WowI didn＇t realize that it took that long
S： And of course he had to apply for patents for all of the new parts he＇d designedYou must do that to protect your ideas
ZR：Has that been a problem
S： Wellin the early yearsJames Dyson found that a large company making carpet cleaners in America was copying his ideasHe had to go to court to protect his invention
ZR：Did he win
S： Yesin the end the company had to pay us a lot of money
ZR：What new ideas does James Dyson have
S： I＇m sorry but you＇ll just have to wait and see
ZR：Thank you very much and I＇m afraid I shall have to ring off nowGoodbye
S： Goodbye
☞Answers to Exercise 2：
washing machinedrumcarpet cleanercourt
☞Answers to Exercise 3：
Object
The problem
James Dyson＇s improvement
Washing machine
Washing machines at that time do not clean the clothes as well as by hand
He invented a machine using two drums which move in opposite directions
练册答案听力原文
Unit 3 Inventors and inventions
LISTENING
LISTENING TEXT
WHICH ONE SHOULD I CHOOSE
Ruth Bacon(RB)is asking her friendZhang Jie(ZJ)for advice
RB：Hellois that Zhang Jie？This is RuthI＇m thinking of buying a new mobile phoneWhat do you suggest
ZJ：Hello RuthI＇m happy to helpIt＇s lucky you could get throughI＇ve been having some trouble with the line and I keep getting cut offIf the line goes deadring me back immediately on my mobile and it should be OKNow what do you want your mobile to do
RB：WellI＇ve heard about mobiles that are computers and can videotape as wellDo you think they＇re a good idea
ZJ：MmmYesthey＇re usefulI can use the Internet even when I＇m on the train
RB：So you suggest one like that then
ZJ：Not necessarilyIt seems there＇ll be some new mobile phones coming on the market next yearThey＇re going to be even more powerful
RB：What are they going to do
ZJ：Ohyou＇ve no idea what they＇re planningThese new phones will be able to organize your lifeThey＇re called 3G phones because they＇re the third generation of mobile phonesTheythinkfor you
RB：How can they do that
ZJ：Wellthey＇ll be able to help you plan a holidayThe phone will book air tickets and the hotelThen it＇ll pay for you
RB：WowI＇m not sure I＇d be happy with thatI don＇t like the idea of a machine spending my money
ZJ：Wellmany businesses already use mobile phones to buy goodsThey leave them to order goods when they are at their cheapest
RB：Do they really？WellI neverWhat I need is a mobile to stop me missing important callsI missed three yesterday because my mobile was switched off
ZJ：You can have that tooThere＇s a new mobile coming out soon that will turn itself on when important calls come through
RB：Are you sure？If that＇s the casethat＇s the one for meThank youZhang JieI think I＇ll wait for that oneGoodbye
ZJ：Goodbye
☞Answers to Exercise 2：
a mobile thatthinks
a mobile that spends your money
a mobile that plans your holiday
a mobile that does videotaping
a mobile that is a computer
☞Suggested answers to Exercise 3：
1 Ruth wants to buy the mobile that turns itself on when it receives important callsShe missed three yesterday when her mobile was switchedturned off
2 Mobiles can videotape and act as a computer now
3 They will be able to plan holidaysbook air ticketshotel and an appropriate place to stayThey will authorize paying for them too
4 Ruth is worried because it might spend her money
5 The advantages are that they help people who are busy at work to order goods at the cheapest price or book holidaysair ticketsetc
6 The mobile may spend money unwisely or spend more than a person can affordYou may forget the spending and not include it in your accounts of your personal income
USING WORDS AND EXPRESSIONS
☞Answers to Exercise 1：
set out ＝ to begin to do sth
to make plans to do sth
set down ＝ to write about sth
set up ＝ to build
set off ＝ to begin a journey
to set fire to
set aside ＝ to cancelto ignore
set about ＝ to start doing sth
to deal with sth in a particular way
1 set aside 2 set out 3 set down 4 set off 5 set up 6 set about 7 set off
☞Answers to Exercise 2：
tapdotswirepracticalinvaluablecompetencepersonneldynamicstable
☞Answers to Exercise 3：
extensionHang onringcallupout of orderget throughcallbackring off
☞Suggested answers to Exercise 4：
1 The eyewitness—a greengrocer proved in court that the driver was innocent of the terrible accidentwhich caused a traffic jam that lasted for several hours
2 I could not bear to live in a city with so much rainfall even though it is good for my skin
3 Helicopters and jeeps are widely used in current wars
4 My associate checked the telephone directory and found the number to dial the aftersales service department when his refrigerator broke down
5 The little girl bumped her head on a corner of the desk and it left a mark like a triangle on her forehead
6 The identification of the correct route was difficult as it was too foggy early in the morning
7 Even though he couldn＇t swimhe dived into the river to save the little girl
8 In summerfarmers like to wear straw hats while working in the fields
USING STRUCTURES
☞Answers to Exercise 1：
disappointingdisappointedamusing
amusedconfusingconfused
surprisedsurprisinginspiredinspiringshockingshocked
☞Answers to Exercise 2：
1 confusedconfusing
2 shockedshocking
3 surprisedsurprising
4 amusing amused
5 disappointingDisappointed
6 inspiringinspired
READING TASK
☞Suggested answers to Exercise 1：
1 Leonardo lived at a time of great instabilitywhen paintings did not always provide a steady income
2 His designs were different because he took things apart and then improved themSo his designs were accurate and could be built and used
3 Painting helped him with his inventions because while painting he had learned to observe things closely and draw accurately
☞Answers to Exercise 2：
Possible skills
from Leonardo
from you
artist
famous paintings such as Mona Lisa
engineer
designed canals
and bridges
architect
designed cities
doctor
not mentioned
inventor
designed many new things such as the bicyclea helicopter and anautomobileetc
scientist
took things apart and found out how they worked in order to design a better one
LISTENING TASK
LISTENING TEXT
WHAT CAN IT BE
Ellie Smith(ES)is discussing with one of her friends Tang Ling(TL)what this invention by Leonardo might be
ES：Look at this drawingWhat do you think this is supposed to be
TL：I don＇t knowIt doesn＇t saybut let＇s see if we can work out what it is
ES：OKNow let＇s seeIt looks a bit like a tent but has four wheels underneath
TL：You＇re rightbut when you look at the second picture with the wheelsyou can see that it had a floor to stand on and wheels below thatDo you think it was a roundabout for children
ES：Good thinkingBut the way that he placed the wheels shows that it must have been for going forwards and backwardsnot round and roundNoI don＇t think it was a roundabout
TL：Let＇s look at it againDo you think it＇s made of metal？The wheels seem to have handles to move them
ES：In that case it must have been large enough for more than one personYou would have needed four people－one to move each wheelSo it cannot be a tent as that is made of cloth
TL：YesI think you＇re right
ES：It also seems to have something like sticks coming out of the bodyDo you think they are for decoration
TL：PerhapsThat is possible as we know Leonardo was an artist
ES：Yes and if that were the caseperhaps it was for fun for the familyIt could carry four people to move the wheels and then another one or two children to helpMaybe six altogether
TL：WowSo it must have been made of metalNothing else could carry all that weight
ES：TrueThe wheels must be made of wood or metal
TL：Do you think it＇s a caravan
ES：Yesthat makes senseIt would be big enough but there doesn＇t seem to be any room to sleep in itAnd it wouldn＇t be very easy to park for the nightSo perhaps it was an early car
TL：Welllet＇s look in the guidebookOh no—it seems you＇re not correct
ES：GraciousSo what on earth can it be
TL：Think again about Leonardo＇s lifeCan＇t you guess
☞Suggested answers to Exercise 3：
The girls＇suggestion
Reasons for
Reasons against
1 a roundabout
has four wheels and a floor
wheels go forwards and backwardsnot round and round
2 a tent
the appearance
made of metal and not cloth
3 a caravan
can movebig enough to carry a family
no room to sleep in itnot easy to park at night
WRITING TASK
☞Sample writing：
The Abacus
The abacus was originally made of woodIt is a rectangular shape with beads strung on itThe shape is unevenly divided so that there are more beads in one part than the other
To use an abacus you need to take lessonsThe smaller part with fewer beads represents the higher numbers and the larger part with more beads represents the smaller numbersBy manipulating these beads you can do a series of different calculationsAn abacus can be used to add figures quickly or do a series of complicated mathematical problemsPeople who are skilled with it can work as fast as a person using a modern calculator
The abacus was in general use from earliest times in ChinaIt is not known whether one person or a group of people invented itBut its value for computation is invaluableIt is one of the few Chinese inventions that was not adopted by the West
文档香网(httpswwwxiangdangnet)户传
《香当网》用户分享的内容，不代表《香当网》观点或立场，请自行判断内容的真实性和可靠性！
该内容是文档的文本内容，更好的格式请下载文档
