阅读下列短文，并做每篇后面的题目。从四个选项中选出能回答所提问题或完成所给句子的最佳答案。Thesoundswehearontheeartharecarriedbytheair.Sincethereisnoaironthemoonpeoplewho

　　阅读下列短文，并做每篇后面的题目。从四个选项中选出能回答所提问题或完成所给句子的最佳答案。

　　Thesoundswehearontheeartharecarriedbytheair.Sincethereisnoaironthemoonpeoplewhogotothemoonmusttalktoeachotherbyradio.Dustinearth'sairthoughverylittlescattersthesunlight.Thismakestheearth'sdaytimeskyblueandtheshadowarenotcompletelydark.Butonthemoontheskyisalwaysblack.Youwouldbeabletoseestarsinthedaytime.Sunnyplacesonthemoonwouldbeverybright.Buttheshadowswouldbealmostblack.Themoonhasnoairorwindtocarrythesun'sheat.Soitcangethotenoughtoboilwaterplaceswherethesunisshiningstraightdown.

　　1．Peoplecan'ttalktoeachotheronthemoonbecausethere________.

　　[]

　　A．arenotlivingthingsonit

　　B．onecan'tspeakloudlywithoutair

　　C．isnoairwhichcarriessounds

　　D．isn'tanydustonthemoon

　　2．Thesunnypartofthemoonis________.

　　[]

　　A．asbrightasthatoftheearth

　　B．brighterthanthatoftheearth

　　C．notsobrightastheearth

　　D．darkerthanthatoftheearth

　　3．Whydoestheearth'sskylookblue?Because________.

　　[]

　　A．ofthefactthattheairisbluegas

　　B．thereisairaroundtheearth

　　C．thereisnodustontheearth

　　D．ofthefactthatthesunlightblue

　　4．Whichofthefollowingiscorrect?

　　[]

　　A．Thesunnyplacesofthemooncangethotenoughtoboilwater.

　　B．Theshadowsonthemoonwouldbecompletelyblack.

　　C．Onthemoontheskylooksratherblue.

　　D．Everystarcanbeseenbypeopleonthemoon.

　　5．Sincethemoonhasnoairorwindtocarrythesun'sheat________.

　　[]

　　A．itcangetveryhotinitsshadows

　　B．itcangetverycoldinitsshadows

　　C．itcangetverycoldbothintheshadowsandtherestpart

　　D．themooncangethotterandhotter