阅读理解

Wheredoesthewindcomefrom?Whatmakesthewindmoveallthetime?Scientiststellusthatitisthesun．Thatmakesairmove,andmakesitblow．Whenthesunshinesontheearth,itmakestheearthhot．Thentheearthmakestheairhot．Whentheairbecomeshotter,italsobecomeslighter．Thelightairgoesup．Coolaircomesintotaketheplaceof(代替)thehotair．Thehotlightairgoesuphigherandhigheruntilitbecomescool．Thenitcomesdownagain,andthentheearthmakesithotagain,andithastogoup．Whentheairmoves,wehavewind．

(1)

Whatmakesthewindmove?

[]

A．

Theair．

B．

Thesun．

C．

Theearth．

D．

Thecloud．

(2)

“Whentheairbecomeshotter,italsobecomeslighter．”Here“it”means(指)________．

[]

A．

thesun

B．

thewind

C．

theearth

D．

theair

(3)

Whichisright?

[]

A．

Thehotairisheavierthanthecoolair．

B．

Thecoolairgoesuptotaketheplaceofthehotair．

C．

Theairmovestomakethewind．

D．

Onrainydayswecanneverfeelwind．

(4)

Whichistherightorder?

a．Theearthmakestheairhot．

b．Thehotairgoesup．

c．Thesunshinesontheearth．

d．Thehotairbecomescool．

[]

A．

a－b－c－d

B．

b－a－c－d

C．

c－a－b－d

D．

d－a－b－c

(5)

Thepassagemainlytellsus________．

[]

A．

howthewindcomesout

B．

whatthewindis

C．

whenwehavethewind