PartIVTranslation
Bymakingvehicleslighterinweightaluminumhasgreatlyreducedtheamountoffuelneededtomovethem,(PassageTwo)
由于能夠減輕運輸工具本身的重量，鋁材能大大地減少驅(qū)動它們本身所需的燃料。
暫無解析
PartIVTranslation：
Oneofthemwasfrommyschooldays,whenourninthgradeteacher,MissRaber,wouldpickoutwordsfromtheReader’sDigesttotestourvocabulary.(PassageFour)
IneverrealizedthatsomedayIwouldbemarriedtoa___.
Hisproposalis_____toallofusandyoudonotneedtotellusmoreaboutit.
Iamafraiditwasa____foryoutodothis.
PartIVTranslation
Tocoverthemarksofthefire,thebuildingwaspaintedwhite.BeforelongitbecameknownastheWhiteHouse.(PassageOne)
