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1、植物是我们生活中必不可少的一个部分，那么你知道植物的重要性吗？Plants form the basic food staple for all life forms.They are the major source of food and oxygen on earth，since no animal can supply these necessary components without plants.There are many different types of cash crops that produce money for farmers.Olive oil comes f
2、rom olives，corn oil comes from corn，and peanut oil comes from peanuts.Typical agricultural products like corn，wheat，rye，and rice are all considered cash crops.Coffee plants produce beans that are used to make coffee；coca plants give us chocolate；vanilla plants grow long thin beans that are used to p
3、roduce vanilla flavoring.Plants are also used in agriculture to help reduce wind speed.Planting trees in a row prevents the wind from blowing away the valuable topsoil.In the forest，trees act as shelter for many organisms.Plants are also important for the overall ecology of an area.Roots help to sta
4、bilize soil and prevent the soil erosion by water runoff.Plants are also important in our atmosphere because they use carbon dioxide and give off oxygen while they undergo photosynthesis.Plants are also used in the urban setting to reduce noise，produce shade，and to beautify an area.Trees add value t
5、o homes and communities.Plants are essential to the balance of nature and in peoples lives.Green plants，i.e.，those possessing chlorophyll(叶绿素)，produce their own food and give off oxygen in the process called photosynthesis (光合作用)，in which water and carbon dioxide are combined by the energy of light.
6、Plants are the ultimate source of food and metabolic energy for nearly all animals，which cannot produce their own food.Besides foods，plant products vital to humans include wood and wood products，fibers，drugs，oils，latex，pigments，and resins.Coal and petroleum (石油) are fossil substances of plant origin
7、.Thus plants provide people not only sustenance but shelter，clothing，medicines，fuels，and the raw materials from which innumerable other products are made.两个诱思问题1What is the purpose of the second paragraph? 2Why are plants important to our atmosphere? 【答案】1.Give some examples about the use of plants.
8、2.Because they use carbon dioxide and give off oxygen while they undergo photosynthesis.Section Reading (Warming Up, Prereading，Reading & Comprehending).根据词性及英文释义写出单词的正确形式1 adj.far away in space or time2 nbalance for weighing；one of the two pans on a balance；relative size，extent，scope，etc.3 nstruggl
9、e；fight；disagreement4 neffort；attempt to do sth.new or difficult5 adj.fixed，fastened or drawn together firmly6 nact of putting a limit on sb./sth.7 nquality of speaking，writing in an easy smooth manner8 vi.to be attractive or interesting (to sb.)【答案】1.distant2.scale3.conflict4.endeavour5.tight6.rest
10、riction7.fluency8.appeal.短语填空date back to；on a large scale；come across；quantities of；fail to；take interest in；result in；appeal to1They are preparing for war 2Stress and tiredness often a lack of concentration.3Does the idea of working for IBM you?4This castle Roman times.5Small poison were detected
11、in the dead mans stomach.【答案】1.on a large scale2.result in3.appeal to4.dates back to5.quantities of.阅读P3233课文内容，从三个选项中选择最佳答案1The first recorded plant exploration happened .Ain the 18th centuryBabout 1，500 years agoCabout 1500 BC2Who is not a collector mentioned in the passage?AFather dIncarville.BTh
12、e Queen of England.CRobert Fortune.3Plants collectors met many difficulties EXCEPT Alack of moneyBthe conflicts with local peopleCrestrictions on the movement of Europeans4Which of the following statements is TRUE according to the text?AThe first plant collecting expedition dated back to 1500 AD.BE
13、H Wilson discovered the Dove Tree among the western plant collectors.CThe second half of the nineteenth century was a very important period of plant exploration.5Whats the text mainly about?ATransporting plants over a long distance was a big problem.BThere was a lot of plant collecting in the 18th a
14、nd 19th centuries.CMany plant collectors were sent to a collecting trip to China.【答案】1.C2.B3.A4.C5.B.阅读P3233课文内容，完成下列表格TimePeople/PlantsHistoric EventsIn 1500 BCthe Queenof Egyptsent ships to 1. ，animals and other goods2. Father dIncarvillewas sent to BeijingIn 1751the Tree of 3. arrived in EnglandI
15、n 1769Sir Joseph Bankscollected plants in 4. In 5. the Tree of Heavenwas introduced in 6. Between 1843 and 1859Robert Fortunemade several trips to ChinaDuring the second half of the 19th centurymany Catholic missionarieswere sent to China from 7. 8. Father Fargessent seeds of Dove Tree from China to
16、 FranceIn 18999. collected a large quantity of the seeds of 10. in China【答案】1.gather plants2.In the 1740s3.Heaven seeds4.Australia5.17846.North America7.France8.In 18979.E H Wilson10.the Dove Tree.阅读P3233课文内容，完成下面课文缩写The plants look so familiar 1. we often dont know that many of them are from countr
17、ies far away，which 2. (date) back to the earliest times.Many plants collectors realized the value of the plants from distant lands.3. ，the exploration of the botanical world didnt begin 4. a large scale 5. the 18th and 19th centuries.Of course，they had many difficulties in the trips，6. (face)many da
18、ngers including disease，nearstarvation，severe environments and 7. (conflict)with the local people.The missionaries collected large 8. (quantity) of specimens，but there was not enough in Western gardens.However，the botanists were very 9. (excite)with the knowledge that China has many kinds of plants，so collectors 10. (send)to China to collect more kinds.【答案】1.that2.dates3.However4.on5.until6.facing7.conflicts8.quantities9.excited10.were sent