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Unit 1 Life on Mars 一. 重点单词
1.pill n药片( small round medicines) in the form of pills medicine n 药 take the/some medicine 服药 make medicine 制药 2.guitar n. play the guitar/ violin/piano ? play football/basketball/volleyball ? play Chinese chess/ play cards 3.sunglass n. wear a pair of sunglasses
glass n杯子，可数名词 two glasses of water 玻璃。不可数名词 a piece of glass 4.polluted adj. a polluted river pollute v. Don’t pollute the river pollution n. 不可数名词water /air /noise pollution
5.develop v. grow and improve How has it developed? developing adj. 发展中的 China is a developing country developed adj. 发达的 America is a developed country.
development n There have been several new developments in electronics.
6.population n. What’s the population of China?=How many people are there in China ? 7.discussion n. The programme started with a discussion about the problem. discuss vt. shall we discuss the matter latter? 8.dry v.烘干 Please dry these clothes. adj.干燥的 In summer it is very dry.
dried adj,干的，干缩的 Dried food can be stored for many months. 9.imagine v.（1）后接名词或代词 You can’t imagine their words.
（2）后跟动名词 Try to be imagine being on the moon.
（3）后跟从句 Don’t imagine that you are the only person in trouble. 10.taste （1）link.v These dumpings taste good
（2）n. Do you have a taste of this green tea? 11.human/people/person
human主要指“人类，人”；people意为“人们”，着重指全体，是单数形式，但表达复数概念，等于men and women; person也可以作“人，人们”着重指个人方面，可以说two persons human-(pl)-humans
12.certain adj. be certain of sth,/doing sth.
sure adj. certain 与sure的含义和用法大致相同，但certain侧重于表示有确定依据或事实，语气比sure 强，多作表语，主语可以是物也可以是人；sure多指主观上相信某人或确定某事，主语一般是人.
It is certain that nobody likes waiting.
Are you sure you borrowed the book from the library? 13.compare vt. compare A with B; compare A and B
eg. We carefully compare the first report with the second. It is interesting to compare their height and our weight/
14.crowded adj.可以作定语也可以作表语，意为“挤满的，拥挤的”常用结构是 be crowded with sth.
This is the most crowded street in Shanghai. The bus is crowded with people who go to work. 15. a number of , the number of 的区别
a number of = numbers of + 可数名词的复数+ 动词形式为复数 A number of visitors come to Suzhou every day.
the number of + 名词的复数+ 动词的三单 意思是“??的总和数量 The number of the students in our class is 65.
16. at half the speed of light 以光速的一半（行驶）， at ( 以??速度,价格等) Eg：The car is running at 80 kilometres an hour. I bought it at a low price.
17. three-eighths 八分之三，在分数词的表述中，记住口诀“分子基数词分母序数词，分子大于1，分母加s”。
如： 1/3 one third 5/6 five sixths Eg: Two thirds of the students in our class are boys. 18. every 和each的共同点和不同点
（1）every 和each后加单数名词，动词用第三人称单数形式。 Eg: Each of the boys in class 2 has bought the book. Eg: Every student is listening to the teacher carefully.
（2）each是一定数目中的每一个，强调“个别”“各有不同”，each是代词，可以和of 连用。
every 只数目不确定中许多人或物中间的“每一个”，强调“总和”更强调“大家一致”。every 后不可以跟of 二. 重点短语
1.be cared for by 2. be able to travel in space 3.wear space helmets to go outside 4.in the form of pills 5.make people feel very ill 6.live on other planets 7.move to Mars 8.at the moment
9.become more and more crowded 10.build a better world
11.too slow to carry large numbers of people 12.travel at half the speed of light 13.need food, water and air to survive 14.three-eighths of the gravity on Earths 15.float away into space 16.prevent/keep/stop sb from doing 17.wear special boots to make themselves heavier 18.compared with life on Mars 19have more space 20.live in a dome with ten bedrooms 21.do most of our work 22.take exams at online schools 23.have their own online teacher 24.in some ways
25.under the control of the computer 26the first to live on..Mars 27.make friends with people who live there 28.take high-quality images 29provide energy for the spacesuit 30travel from Mars to Earth 31send a space robot onto Mars 32.imagine doing sth. 33.so far away from Earth 34.miss the first part
35.start with a discussion 36.be different from the situation 37.worry about living there 38.be afraid of seeing aliens 39.keep these animals away with laser light 40.do harm to them 41.be stored at the Planet Mars Bank 42go somewhere quiet 43buy a car which floats in the air 44.have a rest 45.help me make Sandy calm down 46.too nervous to relax 47.sit by the window 48check your homework 49.work hard to make this dream come true 50.on the surface of 三. 重点句型
1.How do you like life on Mars?= What do you think of life on Mars?