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课时分层训练(八)Unit2Wehavenotfoundlifeonanyotherplanetsyet．

知识点一billion的用法

1．ShaoYifuraisedoverAHongKongdollarsforcharityduringhislifetime．

A．tenbillion B．tenbillions

C．billionof D．tenbillionsof

2．—Lookatthestars．Canyoucountthemclearly?

—No．ThereareCstarsinthesky．

A．twobillions B．twobillionsof

C．billionsof D．twobillionof

3．Ittookthemmorethantwobillion(billion)dollarstobuildthepalace．

知识点二none和noone的用法辨析

1．—Herearethreebooksonhistory．Whichonewouldyoulike?

—A．Imnotinterestedinhistory．

A．None B．All

C．Both D．Little

2．Allthestudentsareplayingintheplayground．Dofthemstayintheclassroom．

A．Either B．Neither

C．Both D．None

3．—Howmanychemicalshaveyouaddedtothewater?

—D．oftheworkerscametoworkyesterday．

A．Nothing;None B．None;Noone

C．Noone;None D．None;None

4．—Heisagreattennisplayer．

—Iagree．IthinkBelseplaysbetter．

A．none B．noone

C．either D．both

知识点三environment的用法

1．Pleasetellmewhatwecandotoprotectour

environment(环境)，MissLee．

2．村子里的环境很好。

Theenvironmentinthevillageisverygood．

3．它们都没有像地球一样的环境。(汉译英)

Noneofthemhasanenvironmentliketheearth．

知识点四impossible的用法

1．ItisDtowriteagoodarticlewithoutreadingalot．

A．useful B．special

C．unlucky D．impossible

2．ItsBformanyorganizationstodotheirworkone-to-onewithoutvolunteers．

A．helpful B．impossible

C．careful D．necessary

3．Itsimpossible(possible)foryoutofinishsuchdifficultworkinanhour．Letmehelpyou．

知识点五communicate的用法

1．NowadayssmartphonesmakeitconvenienttocommunicateDothers．

A．for B．of

C．about D．with

2．Youcanfindbetterlearningmethodsby

communicating(communicate)withyourclassmates．

3．LiLeioftencommunicates(communicate)withhisteachers．

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阅读短文，从方框中选择适当的单词并用其