阅读理解

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

1．Peoplecan'ttalktoeachotheronthemoonbecausethere________.

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A．arenotlivingthingsonit

B．can'tspeakloudlywithoutair

C．isnoairwhichcarriessounds

D．isn'tanydustonthemoon

2．Thesunnypartofthemoonis________.

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A．asbrightasthatoftheearth

B．brighterthanthatoftheearth

C．notsobrightastheearth

D．darkerthanthatoftheearth

3．Whydoestheearth'sskylookblue?Because________.

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A．ofthefactthattheairisbluegas

B．thereisairaroundtheearth

C．thereisnodustontheearth

D．ofthefactthatthesunlightblue

4．Whichofthefollowingiscorrect?

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A．Thesunnyplacesofthemooncangethotenoughtoboilwater.

B．Theshadowsonthemoonwouldbecompletelyblack.

C．Onthemoontheskylooksratherblue.

D．Everystarcanbeseenbypeopleonthemoon.

5．Sincethemoonhasnoairorwindtocarrythesun'sheat________.

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A．itcangetveryhotinitsshadows

B．itcangetverycoldinitsshadows

C．itcangetverycoldbothintheshadowsandtherestpart

D．themooncangethotterandhotter