What he had done is _______
A、valueC
of+n=adj，可以作表語。ofnovalue：沒有一點價值。value是名詞，不能作表語，也不能形容主語的性質。B和D都是of+adj的結構，是錯誤的。
RobertFrostisgenerallyconsideredaregionalpoetwhosesubjectmattersmainlyfocusonthelandscapeandpeoplein().
In1950,()wasawardedtheNobelPrizefortheanti-racistIntruderintheDust.
ItwashismasterpieceTheGreatGatsbythatmade()oneofthegreatestAmericannovelists.
TheAdventuresofTomSawyerand,especially,itssequence()provedthemselvestobethemilestoneintheAmericanliterature.
Withthepublicationof(),TheodoreDreiserwaslaunchinghimselfuponalongcareerthatwouldultimatelymakehimoneofthemostsignificantAmericanwritersoftheschoollaterknownasliterarynaturalism.
