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1、Unit 4 Life on MarsReading (II,Our own planet Earth,Fill in the blanks with proper words,The Earth is being more and more c_ and p_ because the population is increasing r_. Some people would like to move to M_. They think by the year 2100 our s_ could carry large numbers of p_. However, there could
2、be many problems. For example, could humans survive without water, o_ or food? How would people prevent themselves from f_ off in space? Would there be schools on Mars? Anyway, c_ with life on the earth, life on Mars would be interesting as well as c_,rowded,olluted,apidly,ars,pacecraft,assengers,xy
3、gen,loating,ompared,hallenging,Earth is being more and more crowded and polluted because of the rapid increase in population,Why will we leave our own planet Earth,More and more crowded and polluted,more and more 用来加强程度，表示越来越,parative + parative,越来越年轻 越来越快 越来越好 越来越细心 越来越舒服,younger and younger,faster
4、 and faster,better and better,more and more careful,more and more fortable,Make some sentences to praise your partner with the “parative + parative,It takes months. Because our spacecraft are too slow to carry large numbers of people to Mars at present,How long does the spacecraft need to get to Mar
5、s at present,too + adj. + to do,so . that . cant . . adj. + enough to do,Sandy太年轻了而不能去上学,Sandy is too young to go to school,Sandy is so young that she cant go to school,Sandy is not old enough to go to school,By the year 2100, the journey might only take about 20 minutes in spacecraft that travel at
6、 the speed of light,How long does the spacecraft need to get to Mars in the future,at the speed of,光的速度是300,000,000米每(per)秒,我们要以每小时100公里的速度前进,汽车正高速行驶,The speed of the light is 300,000,000 metre per second,The cars are driving at high speed,We should move at the speed of 100 kilometres per hour,Food,
7、Gravity,Free time,Houses,Schools,Life on Mars,Life on Mars,Food would most probably in the form of pills and would not be so tasty,The gravity on Mars is only about three-eighths of that on the Earth,Compared with life on the Earth, people would have more space,Robots would do most of their work so
8、that they could have more time to relax,Every student would have a puter connected to an interplanetary network,Food,Gravity,Houses,Free time,Schools,Food,Gravity,Houses,Free time,Schools,in the form of “以的形式,three-eighths “八分之三” 基数词表示分子，序数词表示分母， 如果分子大于1， 分母要用复数形式,pared with/to “与相比较,so that “以便”，表目
9、的,have a puter connected to 过去分词短语作后置定语,Language points,in the form of,three-eighths,pare with,so that,a puter connected to,Would you like the food in the form of pills? Of course not. I hate eating pills so far,_ (五分之三）of the students in my class _ girls,Three-fifths,are,I pared the first report wi
10、th the second. You did a good job,We should plant more trees _we can have a better environment,so that,What do you read in your spare time? The books written by Han Han are my favourite,Could humans survive on mars without water, oxygen or food,Discussion,Plant more trees to prevent sandstorms. Prot
11、ect wetlands to prevent floods. Go to school by bike instead of taking the car to keep the Earth from getting warmer and warmer. 4. Stop people from cutting down trees. 5. Do not drop litter. 6. Dont build too many tall buildings.,Some suggestions to protect the earth,Theres a place in your heart, A
12、nd I know that it is love. And this place is much brighter than tomorrow. And if you really try, Youll find theres no need to cry. Heal the world. Make it a better place. Heal the world. Make it a better world. Heal the world, For you and for me and for the whole world,Heal the world,Remember the words, phrases and sentences. 2. Retell the article,Homework,Thank you
