必修二Unit 2 重点知识突破.docxVIP

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专题02必修二Unit2基础知识一遍过

重点知识突破

重点单词冲关

重点单词冲关

1.averagen．平均数；平均水平adj.平均的；正常的；普通的v.平均为；计算出……的平均数

[教材原句]Howmanyelephantsarekilledonaverageeveryday?(P14)每天平均有多少大象被杀死?

[用法感知](写出下列各句中average的词性及含义)

①(2022·浙江1月高考)Theaveragepeakworkloadwasmeasuredat103watts.__________

②Itssaidthatthenewspaperofficereceivesanaverageofnearly100articlesaday._________

③(2020·天津高考)AndIhaveneverknownanaveragemanwhohadboth._________

④Thehotelaverages50to100foreignguestsdaily._________

【词块必记】

anaverageof 平均有(后跟数词)

on(the)average 平均(起来)

above/below(the)average 在平均水平以上/以下

【即时练】

[单句语法填空]

(1)_________averageofjust18.75cmofrainfelllastyear,makingitthedriestyearsinceCaliforniabecameastatein1850.

(2)_________average,howmuchtimedoyouspendonsportsactivitieseachweek?

(3)It’ssaidthatthenewspaperofficereceivesanaverage_________nearly100articlesaday.

(4)Lastyearwasthewarmestyearonrecord,withglobaltemperature0.68℃_________average.

[完成句子]

(5)所有学生每周有两节体育课,每天平均跑20分钟。

AllstudentshavetwoPEclassesaweekandrunfor___________20minuteseveryday.

2.concernvt.涉及;让……担忧

[教材原句]I’mconcernedabouttheAfricanelephants.(P15)我担心非洲大象。

【词块必记】

(1)concernoneselfabout... 关心……

(2)showconcernfor... 对……表示关心

(3)concernedadj. 担心的；关切的

beconcernedabout/for 对……关切的；

为……担忧的

as/sofaras...beconcerned 就……而言

[名师点津]

形容词concerned作前置定语时,意为“关心的,挂念的,担心的”;作后置定语时,意为“相关的,有关的”。例如:aconcernedlook意为“关切的神情”;theauthoritiesconcerned意为“有关当局”。

【即时练】

[单句语法填空]

(1)Iboughtanumberofjournals_________(concern)withmysubject.

(2)Allcases_________(concern)childrenaredealtwithinaspecialchildren’scourt.

(3)AsfarasI’m_________(concern),youcan’tignorethefactthatsheisdeeplyconcernedaboutyoursafety.

(4)Sincethereisalwaysheavyfog,manypeoplebegintoconcern_________(they)aboutairpollution.

(5)Hecalledthepolicebecausehewas